GMAT Flashcards: Quant, Verbal & Data Insights Decisions
300 original flashcards for current-format GMAT Quant, Verbal, and Data Insights concepts, cues, and reusable decisions.
เกี่ยวกับเด็คนี้
GMAT Flashcards: Quant, Verbal & Data Insights Decisions
Build quick recall for the current GMAT with 300 original cards across Quantitative Reasoning, Verbal Reasoning, and Data Insights. The deck focuses on reusable concepts and decisions; full-length practice belongs in official or properly licensed question banks.
What the cards map
- Quant maps numeric forms, terms, rules, and formulas to their meaning, conditions, or use. Short scenarios ask for the operation, equation, or answer check that fits.
- Verbal maps passage and argument cues to purpose, scope, evidence, inference, reasoning flaws, and evaluation moves.
- Data Insights maps targets, constraints, source and display cues, metrics, and evidence states to the interpretation or decision they support. It covers Data Sufficiency, Multi-Source Reasoning, Table Analysis, Graphics Interpretation, and Two-Part Analysis.
Learning order
The mixed sequence keeps all three sections in rotation. Quant foundations come before algebra, models, and strategy checks; passage reading comes before argument evaluation; shared data literacy comes before the five Data Insights formats. Closely related prompts are spaced apart so one card does not cue the next.
Current-format boundary
This deck has no geometry lessons or formula drills, Sentence Correction, or the retired Integrated Reasoning section. It also excludes timing, scoring, test-center policy, full passages, large data sets, and response-pattern tricks.
Every card is an original compact concept or decision prompt. No official or competitor questions, answer choices, explanations, mark schemes, curriculum text, logos, or trade dress were copied or adapted. See the official GMAT exam content and Data Insights preparation guidance for the current exam boundary.
This is an independent, unofficial study resource. It is not affiliated with, endorsed by, or sponsored by the Graduate Management Admission Council (GMAC). GMAT is used only to identify the exam.
การ์ดในเด็คนี้
การ์ด 1
คำถาม
Which numerator-and-denominator operation creates an equivalent fraction?
คำตอบ
Multiply or divide the numerator and denominator by the same nonzero number. The fraction's value stays unchanged.
การ์ด 2
คำถาม
What does data sufficiency ask you to determine?
คำตอบ
Whether the information guarantees one answer. You usually don’t need to calculate that answer.
การ์ด 3
คำถาม
How do you form a passage's main idea?
คำตอบ
Combine the passage's central topic with its main claim about that topic. The answer should cover the whole passage at the right level.
การ์ด 4
คำถาม
What does multiplying a decimal by 10ⁿ do when n is a positive integer?
คำตอบ
It moves the decimal point n places to the right. Dividing by 10ⁿ moves it n places left.
การ์ด 5
คำถาม
What makes information sufficient for a value question?
คำตอบ
It forces exactly one value for the target. Different values that satisfy all conditions make it insufficient.
การ์ด 6
คำถาม
How do you identify the passage's primary purpose?
คำตอบ
Name what the author is doing with the topic: explaining, comparing, challenging, defending, or proposing. Keep content and action together.
การ์ด 7
คำถาม
How do you find p percent of a quantity q?
คำตอบ
Compute (p/100) × q. Translate “of” as multiplication.
การ์ด 8
คำถาม
How can two valid cases prove insufficiency?
คำตอบ
Make the cases produce different answers to the question. One clean counterexample pair is enough.
การ์ด 9
คำถาม
How do you determine a paragraph's role?
คำตอบ
Connect the paragraph to what comes before and after it. Decide whether it introduces, supports, qualifies, contrasts, applies, or concludes the larger discussion.
การ์ด 10
คำถาม
A total of 45 is split in the ratio 2:3. What are the two parts?
คำตอบ
18 and 27. The five ratio units are worth 45 ÷ 5 = 9 each.
การ์ด 11
คำถาม
Why can an integer restriction change sufficiency?
คำตอบ
It removes noninteger possibilities. A range containing many real numbers may contain only one integer.
การ์ด 12
คำถาม
When is a product of signed factors negative?
คำตอบ
Provided no factor is zero, an odd number of negative factors gives a negative product, while an even number gives a positive product. If any factor is zero, the product is zero.
การ์ด 13
คำถาม
How should two data-sufficiency statements be tested initially?
คำตอบ
Test each statement independently against the stem. Do not carry information from one statement into the other.
การ์ด 14
คำถาม
What makes an integer greater than 1 prime?
คำตอบ
It has exactly two positive divisors: 1 and itself.
การ์ด 15
คำถาม
What should you do first on a detail question?
คำตอบ
Return to the relevant lines and read their local context. Memory tends to preserve the topic while blurring qualifications.
การ์ด 16
คำถาม
What is the divisibility rule for 2?
คำตอบ
The last digit must be even: 0, 2, 4, 6, or 8.
การ์ด 17
คำถาม
How do you test whether a fact is relevant?
คำตอบ
Connect it to the requested target. A true fact that does not narrow the target adds no decision value.
การ์ด 18
คำถาม
How far may a reading inference go beyond the text?
คำตอบ
Only as far as the text strongly supports. Prefer the smallest justified step and reject claims needing outside knowledge.
การ์ด 19
คำถาม
Why is prime factorization useful in GMAT arithmetic?
คำตอบ
It exposes divisibility, factors, greatest common factors, least common multiples, and perfect powers.
การ์ด 20
คำถาม
What must happen before quantities with different units are combined?
คำตอบ
First confirm that their dimensions are compatible, then convert them to a common unit. Keep the unit attached through the calculation to catch mismatches.
การ์ด 21
คำถาม
How do you apply a passage principle to a new case?
คำตอบ
Extract the principle's required conditions, then test whether the new case has them. Surface similarity isn't enough.
การ์ด 22
คำถาม
Which relationship connects distance, rate, and time?
คำตอบ
Distance = rate × time. Rearrange only after the units are compatible.
การ์ด 23
คำถาม
How do you find a least common multiple from prime factorizations?
คำตอบ
Take every prime that appears, using the largest exponent present.
การ์ด 24
คำถาม
How do you multiply powers with the same base?
คำตอบ
Add the exponents: aᵐ × aⁿ = aᵐ⁺ⁿ.
การ์ด 25
คำถาม
How is a weighted average computed?
คำตอบ
Divide the total weighted value by the total weight. For groups, use group size as the weight unless another weight is given.
การ์ด 26
คำถาม
What should a quick passage map record?
คำตอบ
Each paragraph's role and major viewpoint, plus the passage's overall direction. Record structure, not a sentence-by-sentence summary.
การ์ด 27
คำถาม
What does the principal square root symbol √x return?
คำตอบ
For real x ≥ 0, it is the nonnegative number whose square is x. For example, √9 = 3, not ±3.
การ์ด 28
คำถาม
When can bounds replace exact arithmetic?
คำตอบ
When the bounds separate the viable decisions. Stop once every value in the interval leads to the same choice.
การ์ด 29
คำถาม
How do you keep viewpoints separate?
คำตอบ
Attach each claim to its speaker: author, critic, researcher, or group. Track agreement, disagreement, and any later qualification.
การ์ด 30
คำถาม
How do “sum,” “product,” and “quotient” translate into algebra?
คำตอบ
They mean addition, multiplication, and division, respectively.
การ์ด 31
คำถาม
How do you reduce a fraction to lowest terms?
คำตอบ
Divide the numerator and denominator by their greatest common factor.
การ์ด 32
คำถาม
What evidence should determine the author's tone?
คำตอบ
Evaluative words, qualifications, and the treatment of competing views. Topic alone doesn't establish approval, concern, or skepticism.
การ์ด 33
คำถาม
When should rounding usually occur?
คำตอบ
At the end, unless estimation already settles the decision. Early rounding can move a result across a cutoff.
การ์ด 34
คำถาม
How do you convert a terminating decimal to a fraction?
คำตอบ
Write the digits over the matching power of 10, then reduce. For example, 0.375 = 375/1000 = 3/8.
การ์ด 35
คำถาม
When should you stop calculating in a sufficiency problem?
คำตอบ
As soon as uniqueness is proved or disproved. More arithmetic cannot change the sufficiency decision.
การ์ด 36
คำถาม
How do you spot an out-of-scope answer?
คำตอบ
It introduces a person, period, cause, or consequence the passage doesn't address. Being reasonable doesn't make it textually supported.
การ์ด 37
คำถาม
What is the percent-change formula?
คำตอบ
For original > 0, percent change = (new − original) / original × 100%. Percent change from zero is undefined; negative baselines require context-specific interpretation.
การ์ด 38
คำถาม
What makes information sufficient for a yes-or-no question?
คำตอบ
It forces the same yes-or-no answer in every valid case. The underlying value may still vary.
การ์ด 39
คำถาม
What preserves a ratio when its quantities are scaled?
คำตอบ
Multiplying or dividing both terms by the same nonzero factor preserves the ratio.
การ์ด 40
คำถาม
How do you reject a main-idea answer with the wrong scope?
คำตอบ
Compare it with the whole passage. A detail-only answer is too narrow; a claim extending beyond the passage is too broad.
การ์ด 41
คำถาม
Why should you track whether a variable is positive, negative, or zero?
คำตอบ
Sign controls valid cases and operations. Squaring can hide sign, and division requires a nonzero denominator.
การ์ด 42
คำถาม
How do you simplify subtraction of a negative number?
คำตอบ
Change it to addition: a − (−b) = a + b.
การ์ด 43
คำถาม
Whose purpose matters in a primary-purpose question?
คำตอบ
The passage author's purpose. A theory or researcher may be described at length without representing what the author ultimately wants to do.
การ์ด 44
คำถาม
When is the on-screen calculator most useful?
คำตอบ
For tedious arithmetic after the setup is clear. It does not replace choosing the right relationship or denominator.
การ์ด 45
คำถาม
In Data Sufficiency, what stem information applies when testing either statement?
คำตอบ
Everything in the question stem. Stem facts remain active for each statement and for the combination.
การ์ด 46
คำถาม
What is the divisibility rule for 3?
คำตอบ
The sum of the digits must be divisible by 3.
การ์ด 47
คำถาม
What does a transition paragraph often do?
คำตอบ
It closes one line of thought and sets up the next. Its role depends on both sides, not only on its first sentence.
การ์ด 48
คำถาม
When is a proxy measure useful?
คำตอบ
When evidence shows it reliably tracks the target for the intended decision. Correlation may support prediction, but it proves neither causation nor suitability on its own.
การ์ด 49
คำถาม
How do you find a greatest common factor from prime factorizations?
คำตอบ
Take each shared prime to the smaller exponent.
การ์ด 50
คำถาม
What is the arithmetic mean?
คำตอบ
The sum of the values divided by the number of values.
การ์ด 51
คำถาม
What units should a rate have?
คำตอบ
One quantity per another, such as kilometers per hour. The denominator tells you what the rate is measured against.
การ์ด 52
คำถาม
How do you divide powers with the same nonzero base?
คำตอบ
Subtract the exponents: aᵐ ÷ aⁿ = aᵐ⁻ⁿ.
การ์ด 53
คำถาม
What makes a paraphrase faithful to a passage detail?
คำตอบ
It preserves the original meaning, scope, and certainty in different words. Shared keywords alone don't make it accurate.
การ์ด 54
คำถาม
How do you recover a total from an average?
คำตอบ
Total = average × number of values.
การ์ด 55
คำถาม
How do you choose between two plausible reading inferences?
คำตอบ
Choose the one with the tighter textual chain and fewer assumptions. Plausibility in the real world is secondary.
การ์ด 56
คำถาม
What quick check can catch a calculator-entry error?
คำตอบ
Estimate the order of magnitude and direction first. An exact result far outside that range deserves another look.
การ์ด 57
คำถาม
How do you simplify a square root with a perfect-square factor?
คำตอบ
Factor out the perfect square. For example, √72 = √(36 × 2) = 6√2.
การ์ด 58
คำถาม
What makes a new example parallel to one in the passage?
คำตอบ
The same logical relationship. Match cause, contrast, exception, or function rather than shared subject matter.
การ์ด 59
คำถาม
When can work rates be added?
คำตอบ
Add the stated constant rates when the workers operate simultaneously without interfering with one another. At 1/4 and 1/6 job per hour, together they complete 5/12 job per hour.
การ์ด 60
คำถาม
What is the denominator in a percent comparison?
คำตอบ
The stated reference value. “A as a percent of B” means A divided by B, then multiplied by 100.
การ์ด 61
คำถาม
How do you translate “5 less than x”?
คำตอบ
x − 5. The phrase “less than” reverses the spoken order.
การ์ด 62
คำถาม
In Data Sufficiency, what should you check before testing values?
คำตอบ
The full domain. Honor stated restrictions and implicit ones such as positive lengths or nonzero divisors before judging sufficiency.
การ์ด 63
คำถาม
How do you add fractions with different denominators?
คำตอบ
Rewrite them with a common denominator, then add the numerators. For example, 2/3 + 1/4 = 8/12 + 3/12 = 11/12.
การ์ด 64
คำถาม
How do you distinguish description from argument in a passage?
คำตอบ
Description presents what happened or what a view says; argument gives reasons to accept, reject, or revise a claim.
การ์ด 65
คำถาม
How should you compare decimals with different lengths?
คำตอบ
Append trailing zeros and compare place by place. For example, compare 0.47 with 0.4700, which are equal.
การ์ด 66
คำถาม
How should combined statements be evaluated?
คำตอบ
Intersect their constraints with the stem. The combination is sufficient only if every remaining case gives one answer.
การ์ด 67
คำถาม
How do you find common ground between two viewpoints?
คำตอบ
Look for the narrow claim both accept, even if they disagree about its cause, importance, or implications.
การ์ด 68
คำถาม
How do you solve a proportion such as a/b = c/d?
คำตอบ
Cross-multiply to get ad = bc, provided b and d are nonzero.
การ์ด 69
คำถาม
How is average speed computed?
คำตอบ
Total distance divided by total time. It is not usually the simple mean of the segment speeds.
การ์ด 70
คำถาม
What does |x| represent?
คำตอบ
The nonnegative distance from x to 0 on the number line.
การ์ด 71
คำถาม
Why are strongly emotional tone descriptions often wrong?
คำตอบ
They overstate measured academic prose. Match the answer's intensity to the author's actual language.
การ์ด 72
คำถาม
What is the divisibility rule for 4?
คำตอบ
The number formed by the last two digits must be divisible by 4.
การ์ด 73
คำถาม
Can the ordinary percent-change formula be applied directly when the original value is zero or negative?
คำตอบ
No. The ordinary GMAT rule assumes original > 0. Change from zero is undefined, and a negative baseline requires context-specific interpretation.
การ์ด 74
คำถาม
Why can a true statement still be a wrong answer?
คำตอบ
It may not answer the question asked. Check the task—main idea, detail, inference, role, or purpose—before checking truth.
การ์ด 75
คำถาม
When must a weighted average lie between its component values?
คำตอบ
When every weight is nonnegative and the total weight is positive. The average then lies between the smallest and largest component values.
การ์ด 76
คำถาม
How do you express an integer n divided by d with remainder r?
คำตอบ
n = dq + r, where q is an integer and 0 ≤ r < d for positive d.
การ์ด 77
คำถาม
What does an inequality usually provide?
คำตอบ
A range, not a unique value. It can still be sufficient if the question asks whether a threshold is crossed.
การ์ด 78
คำถาม
How should you handle an EXCEPT detail prompt?
คำตอบ
Verify four statements against the passage and select the one that isn't supported. Keep the reversed task visible while checking each choice.
การ์ด 79
คำถาม
How should you set up a unit conversion?
คำตอบ
Multiply by a conversion factor equal to 1, placing units so the unwanted unit cancels.
การ์ด 80
คำถาม
Can two individually insufficient statements remain insufficient together?
คำตอบ
Yes. They may repeat the same limitation or still leave multiple valid answers.
การ์ด 81
คำถาม
For a positive base, how do you simplify a power raised to another power?
คำตอบ
Multiply the exponents: (aᵐ)ⁿ = a^(mn).
การ์ด 82
คำถาม
When can you infer that an author accepts a claim?
คำตอบ
When the author endorses it directly or relies on it without distancing language. Merely reporting another person's view isn't endorsement.
การ์ด 83
คำถาม
How should successive percentage changes be combined?
คำตอบ
Multiply their factors. A 10% rise followed by a 10% fall gives 1.10 × 0.90 = 0.99, a 1% net fall.
การ์ด 84
คำถาม
What are compatible numbers in estimation?
คำตอบ
Nearby numbers chosen to make mental arithmetic easy, such as 203 ÷ 9.9 ≈ 200 ÷ 10 = 20.
การ์ด 85
คำถาม
Which constraints are easy to overlook in a word problem?
คำตอบ
Countability, positivity, distinctness, and capacity limits. Translate each noun and rule into a usable constraint.
การ์ด 86
คำถาม
How do you state the exact disagreement between two viewpoints?
คำตอบ
Identify one claim that one side accepts and the other rejects. Don't substitute a topic that only one side discusses.
การ์ด 87
คำถาม
How do you represent three consecutive integers?
คำตอบ
n, n + 1, and n + 2 for an integer n.
การ์ด 88
คำถาม
How do percentage points differ from percent change?
คำตอบ
Percentage points are the direct difference between percentages. Moving from 20% to 25% is 5 points and a 25% relative increase.
การ์ด 89
คำถาม
What is a reversed-relationship trap?
คำตอบ
It swaps cause and effect, support and conclusion, or the positions of two viewpoints while reusing familiar passage language.
การ์ด 90
คำถาม
How do you multiply two fractions?
คำตอบ
Multiply numerator by numerator and denominator by denominator, canceling common factors when convenient.
การ์ด 91
คำถาม
How do direct and inverse proportion differ?
คำตอบ
Direct:
y = kx; inverse:y = k/xforx ≠ 0.การ์ด 92
คำถาม
How do you recover an original value after a percentage increase?
คำตอบ
Divide the new value by the growth factor. After a 20% increase, original = new ÷ 1.20.
การ์ด 93
คำถาม
When should absolute wording raise suspicion?
คำตอบ
When the passage is qualified. Words such as always, never, entirely, and impossible require equally strong textual support.
การ์ด 94
คำถาม
What should you identify first in Data Sufficiency?
คำตอบ
The exact target and answer type. Decide whether the stem asks for a value, a comparison, or a yes-or-no result.
การ์ด 95
คำถาม
What ending makes an integer divisible by 5 or by 10?
คำตอบ
A last digit of 0 or 5 gives divisibility by 5; a last digit of 0 gives divisibility by 10.
การ์ด 96
คำถาม
How should a Data Sufficiency condition be handled?
คำตอบ
Translate it into a precise constraint before testing sufficiency. Keep it separate from the conclusion you want.
การ์ด 97
คำถาม
How do you reject a half-right answer?
คำตอบ
Test every part of it. One accurate clause can't rescue a second clause that distorts the passage or exceeds its scope.
การ์ด 98
คำถาม
When you convert a positive measurement to a smaller linear unit, what happens to its numerical value?
คำตอบ
It increases. Multiply by the number of smaller units in one larger unit.
การ์ด 99
คำถาม
DS example: Is x > 5? Statement: x > 3. Is the statement sufficient?
คำตอบ
No. Both x = 4 and x = 6 satisfy the statement, but they answer the stem differently.
การ์ด 100
คำถาม
What is a⁰ when a is nonzero?
คำตอบ
- The nonzero-base condition matters because 0⁰ is not assigned this rule.
การ์ด 101
คำถาม
Which claim is the argument trying to establish?
คำตอบ
The main conclusion. Find the claim supported by the other statements, then check that it answers the argument's central issue.
การ์ด 102
คำถาม
When should the two statements be combined?
คำตอบ
When neither statement is sufficient alone. Use both constraints at once and test the remaining possibilities.
การ์ด 103
คำถาม
A positive number rounds to 8.2 to the nearest tenth. What interval contains it?
คำตอบ
8.15 ≤ x < 8.25. The lower endpoint rounds up to 8.2; the upper endpoint rounds to 8.3.
การ์ด 104
คำถาม
What should you check when the conclusion changes populations?
คำตอบ
Whether the evidence applies to the new population. Results from volunteers, specialists, or one age group may not transfer to everyone.
การ์ด 105
คำถาม
How should test values be chosen in Data Sufficiency?
คำตอบ
Choose valid values that probe boundaries, signs, and distinct outcomes. Random easy values can miss the deciding case.
การ์ด 106
คำถาม
How do you translate “A is 30% more than B”?
คำตอบ
A = 1.30B. The percentage is based on B.
การ์ด 107
คำถาม
When can one equation involving two variables be sufficient for a target?
คำตอบ
When every valid solution gives the same target value, even if neither variable is unique. For example, x + y = 10 is sufficient to determine x + y.
การ์ด 108
คำถาม
What does a correlation establish by itself?
คำตอบ
Only that two things vary together. It doesn't establish which one causes the other or whether a third factor causes both.
การ์ด 109
คำถาม
How do you divide by a nonzero fraction?
คำตอบ
Multiply by its reciprocal. For example, 3/5 ÷ 2/7 = 3/5 × 7/2.
การ์ด 110
คำถาม
Why is a ratio often insufficient for an absolute value?
คำตอบ
A ratio fixes relative size but usually leaves the scale free. Many proportional pairs can share the same ratio.
การ์ด 111
คำถาม
What is the divisibility rule for 9?
คำตอบ
The sum of the digits must be divisible by 9.
การ์ด 112
คำถาม
What matters most when applying a sample result to a population?
คำตอบ
Representativeness. The sample must resemble the target population on traits that could affect the result.
การ์ด 113
คำถาม
What should you check after solving a squared equation?
คำตอบ
Check every allowed root. If positive and negative roots produce different target answers, the information is insufficient.
การ์ด 114
คำถาม
What does a negative exponent mean?
คำตอบ
It takes the reciprocal: a⁻ⁿ = 1/aⁿ for nonzero a.
การ์ด 115
คำถาม
Which baseline makes a comparison informative?
คำตอบ
The baseline relevant to the claim. Compare the outcome with what would otherwise have happened, not merely with an unrelated earlier figure.
การ์ด 116
คำถาม
What risk appears when an equation factors into multiple branches?
คำตอบ
Each branch may create valid cases. Test all branches against the stem before deciding sufficiency.
การ์ด 117
คำถาม
How can you compare two positive fractions quickly?
คำตอบ
Compare their cross-products. For a/b and c/d with positive denominators, compare ad with bc.
การ์ด 118
คำถาม
What may be assumed from a Data Sufficiency diagram?
คำตอบ
Only marked or stated facts. Do not infer scale, equality, perpendicularity, or midpoint status from appearance.
การ์ด 119
คำถาม
What multiplier represents a p percent increase or decrease?
คำตอบ
Use 1 + p/100 for an increase and 1 − p/100 for a decrease.
การ์ด 120
คำถาม
Which statements count as evidence?
คำตอบ
The statements offered as reasons to accept another claim. Evidence may be factual or assumed for the argument, even if it isn't proven in real life.
การ์ด 121
คำถาม
Can a mean determine an individual observation?
คำตอบ
Not by itself. A mean fixes the total, but different sets can have that total unless more constraints apply.
การ์ด 122
คำถาม
What weakens a move from past evidence to a present claim?
คำตอบ
A relevant change over time. New technology, prices, rules, or behavior can make the earlier evidence a poor guide.
การ์ด 123
คำถาม
A value becomes 96 after a 20% increase. What was the original value?
คำตอบ
- Divide the final value by the growth multiplier: 96 ÷ 1.2 = 80.
การ์ด 124
คำถาม
How do extreme valid cases help in Data Sufficiency?
คำตอบ
They expose whether the target can change. Test the smallest, largest, or boundary cases allowed by the conditions.
การ์ด 125
คำถาม
How do you test for reverse causation?
คำตอบ
Ask whether the alleged effect could instead cause the alleged cause. Productive teams may meet more because they are productive, not the reverse.
การ์ด 126
คำถาม
Must a sufficient statement make every variable unique?
คำตอบ
No. It only needs to make the requested target unique, even if other variables remain undetermined.
การ์ด 127
คำถาม
A price rises 20% and then falls 20%. Does it return to its original value?
คำตอบ
No. The multipliers give 1.20 × 0.80 = 0.96, so the final price is 4% below the original.
การ์ด 128
คำถาม
Why can a voluntary survey be biased?
คำตอบ
People who choose to respond may differ from those who don't. Strong opinions or extra interest can distort the sample.
การ์ด 129
คำถาม
How do you expand a(b + c)?
คำตอบ
ab + ac. The outside factor multiplies every term inside the parentheses.
การ์ด 130
คำถาม
What should the final Data Sufficiency decision describe?
คำตอบ
Which information set guarantees an answer. It should not report the target’s numerical value.
การ์ด 131
คำถาม
What is the goal when solving a linear equation?
คำตอบ
Isolate the variable by applying equivalent operations to both sides.
การ์ด 132
คำถาม
DS example: Is integer n even? Statement: n = 7. Is the statement sufficient?
คำตอบ
Yes. It guarantees one answer—no. A statement can be sufficient even when that answer is negative.
การ์ด 133
คำถาม
When must an inequality sign reverse?
คำตอบ
When both sides are multiplied or divided by a negative number.
การ์ด 134
คำถาม
What must be checked before comparing two groups?
คำตอบ
Whether they differ in other relevant ways. Age, experience, starting level, or incentives may explain the outcome instead.
การ์ด 135
คำถาม
When is substitution preferable to elimination in a two-equation system?
คำตอบ
Use substitution when one variable is already isolated or easy to isolate; use elimination when coefficients cancel easily.
การ์ด 136
คำถาม
What should you build before analyzing Multi-Source Reasoning material?
คำตอบ
A quick source map. Note what each tab or document contains, who produced it, and the relevant date or scope.
การ์ด 137
คำถาม
How do you separate background from evidence?
คำตอบ
Ask whether the statement supports a claim. Background sets context; evidence does logical work in moving the argument toward a conclusion.
การ์ด 138
คำถาม
Which algebraic terms can be combined?
คำตอบ
Terms with the same variable part and exponents. For example, 3x² and −5x² combine, but 3x² and 3x do not.
การ์ด 139
คำถาม
When should you read the Multi-Source Reasoning question?
คำตอบ
Before a deep read of every source. The question tells you which details deserve attention.
การ์ด 140
คำถาม
What is a reliable first step for an equation containing several fractions?
คำตอบ
Multiply every term by the least common denominator, then solve the simpler equation.
การ์ด 141
คำถาม
Why does source provenance matter?
คำตอบ
It defines what a claim can support. An internal forecast and an audited result do not carry the same evidentiary weight.
การ์ด 142
คำถาม
What should you test when evidence comes from a different setting?
คำตอบ
Whether the settings differ in a way that affects the result. A finding from one market, school, or climate may not carry over unchanged.
การ์ด 143
คำถาม
What does an “and” compound inequality require?
คำตอบ
The overlap of both solution sets. A value must satisfy both conditions.
การ์ด 144
คำถาม
What should you compare before combining claims from two sources?
คำตอบ
Their population, period, units, and definitions. Matching labels can hide different scopes.
การ์ด 145
คำถาม
How can a third factor undermine a causal claim?
คำตอบ
It may explain both events, so their correlation no longer establishes a direct causal link by itself. Hot weather can raise both cold-drink sales and pool attendance.
การ์ด 146
คำถาม
What do one, zero, or infinitely many solutions mean for two linear equations in two variables?
คำตอบ
The lines intersect once, are parallel and distinct, or are the same line, respectively.
การ์ด 147
คำถาม
How should records from separate sources be linked?
คำตอบ
Use a shared key with the same meaning in both sources, such as product code and month. Do not join on a vague label alone.
การ์ด 148
คำถาม
How do you factor 6x + 9?
คำตอบ
3(2x + 3). Pull out the greatest common factor.
การ์ด 149
คำถาม
When does nonresponse threaten a survey result?
คำตอบ
When nonrespondents may answer differently from respondents. A high response count doesn't fix a systematic missing group.
การ์ด 150
คำถาม
What is the first step when two sources seem inconsistent?
คำตอบ
Compare definitions, dates, units, and aggregation levels. Many apparent conflicts come from mismatched frames.
300 การ์ด
GMAT Flashcards: Quant, Verbal & Data Insights Decisions
เรียนเด็คนี้ฟรีNibomo จะเปิดขึ้นเพื่อให้คุณเริ่มเรียนได้ทันที
การ์ด 151
คำถาม
When can you use the zero-product property?
คำตอบ
After rewriting a product equal to zero. If (x − 2)(x + 5) = 0, then x = 2 or x = −5.
การ์ด 152
คำถาม
How does an inference differ from a stated fact?
คำตอบ
A fact appears directly in a source; an inference must follow from the sources without an extra assumption.
การ์ด 153
คำถาม
Does a higher percentage by itself prove a higher count?
คำตอบ
No. The underlying totals matter. Twenty percent of 1,000 is more than fifty percent of 100.
การ์ด 154
คำถาม
What does an “or” compound inequality require?
คำตอบ
The union of the solution sets. A value may satisfy either condition or both.
การ์ด 155
คำถาม
What does a blank or omitted value establish?
คำตอบ
Only that the value is not provided. It does not establish zero, no change, or failure.
การ์ด 156
คำถาม
How do you recognize an intermediate conclusion?
คำตอบ
It is supported by one claim and supports another. It acts as both a conclusion and a premise in the same argument.
การ์ด 157
คำถาม
What should you do before writing equations for a two-quantity word problem?
คำตอบ
Define each variable with its unit, then translate one independent relationship per equation.
การ์ด 158
คำถาม
Why should cross-source events be placed in time order?
คำตอบ
Sequence separates prior conditions from later outcomes and prevents using future information as an earlier cause.
การ์ด 159
คำถาม
When should candidate solutions be checked in the original equation?
คำตอบ
Always after a step that may introduce solutions, especially squaring both sides or clearing variable denominators.
การ์ด 160
คำถาม
How can switching from one measured outcome to another create a gap?
คำตอบ
Evidence about one metric may not support a conclusion about another. More website visits, for example, don't by themselves mean more sales.
การ์ด 161
คำถาม
What makes a source relevant to a claim?
คำตอบ
It supplies evidence for a required link in the claim. Related background alone is not enough.
การ์ด 162
คำถาม
How do you solve a factored polynomial inequality reliably?
คำตอบ
Find the zeros, split the number line into intervals, and test each interval's sign. Include a zero only when equality is allowed.
การ์ด 163
คำถาม
Does happening first prove causation?
คำตอบ
No. The timing may fit a causal story, but coincidence or another cause can still explain the later event.
การ์ด 164
คำถาม
How can you spot an unsupported cross-source conclusion?
คำตอบ
Identify the bridge between evidence and conclusion. If the sources never establish that bridge, the conclusion needs an assumption.
การ์ด 165
คำถาม
What do 0 = 0 and 0 = 5 mean after simplifying an equation?
คำตอบ
0 = 0 means every allowed value is a solution; 0 = 5 means there is no solution.
การ์ด 166
คำถาม
What should you verify before comparing figures from different sources?
คำตอบ
Common units and denominators. Convert first, then compare the same quantity on the same basis.
การ์ด 167
คำถาม
How do you interpret |x − a| < r when r is positive?
คำตอบ
x is within r units of a: a − r < x < a + r.
การ์ด 168
คำถาม
What can a larger sample improve?
คำตอบ
Precision, if the sampling method is sound. A huge biased sample can still give a confidently wrong picture of the population.
การ์ด 169
คำถาม
How should a cross-source recommendation be evaluated?
คำตอบ
Apply the stated decision rule to the combined evidence. Do not substitute a personal preference for the rule.
การ์ด 170
คำถาม
If a worker finishes one job in t hours, what is the worker's hourly rate?
คำตอบ
1/t of the job per hour.
การ์ด 171
คำถาม
What can an average hide?
คำตอบ
The distribution. Two groups can share an average while differing sharply in range, concentration, or the number of extreme values.
การ์ด 172
คำถาม
What should you confirm before submitting a Multi-Source Reasoning answer?
คำตอบ
That every required part is supported by the correct source and scope. One unsupported component can invalidate the whole decision.
การ์ด 173
คำถาม
How do you find the amount of a pure component in a mixture?
คำตอบ
Concentration × total mixture amount. A 30% solution with volume 20 contains 0.30 × 20 = 6 units of the component.
การ์ด 174
คำถาม
What role does a concession usually play?
คำตอบ
It acknowledges a point that weighs against the conclusion, then answers that point or limits its relevance. Don't mistake the conceded claim for the argument's main conclusion.
การ์ด 175
คำถาม
When can an apparent cross-source discrepancy be resolved?
คำตอบ
When a stated difference in scope or method explains both figures. If no bridge is given, keep the conflict open.
การ์ด 176
คำถาม
What is the two-set overlap formula?
คำตอบ
In A or B = in A + in B − in both. Subtract the overlap because it was counted twice.
การ์ด 177
คำถาม
What should you identify first in Table Analysis?
คำตอบ
The row unit, column definitions, and any notes. This establishes what one record and each value represent.
การ์ด 178
คำถาม
What is the fundamental counting principle?
คำตอบ
Multiply the choices at successive stages when each stage has a fixed number of available choices.
การ์ด 179
คำถาม
Why distinguish relative change from absolute change?
คำตอบ
Relative change is the percentage change; absolute change is the amount added or lost. A 50% rise from 2 adds 1, while a 10% rise from 1,000 adds 100.
การ์ด 180
คำถาม
How should a table filter be translated?
คำตอบ
Turn it into an exact inclusion rule. Apply every condition before counting or comparing rows.
การ์ด 181
คำถาม
For equally likely outcomes, what is the basic probability formula?
คำตอบ
Favorable outcomes divided by total possible outcomes.
การ์ด 182
คำถาม
What makes a proposed causal mechanism useful?
คำตอบ
It explains how the cause could produce the effect. A plausible, evidence-backed mechanism strengthens the causal link.
การ์ด 183
คำถาม
How do you find the median?
คำตอบ
Order the values and take the middle value; for an even count, average the two middle values.
การ์ด 184
คำถาม
How should numeric values be sorted?
คำตอบ
By numerical value, not digit order. For example, 12 comes after 9 in ascending order.
การ์ด 185
คำถาม
What is missed when evidence includes only successful cases?
คำตอบ
The failures. Studying only surviving firms can make a strategy look safer or more effective than it is.
การ์ด 186
คำถาม
Two machines have stated constant rates of 1/3 and 1/5 job per hour and operate simultaneously without interference. May their rates be added?
คำตอบ
Yes. The stated rates are constant and the machines do not interfere, so their combined rate is 1/3 + 1/5 = 8/15 job per hour.
การ์ด 187
คำถาม
How should a table ratio be built when filters are involved?
คำตอบ
Derive the numerator and denominator separately from the question, then apply each filter only where it is relevant. Do not automatically filter both quantities or default to all rows.
การ์ด 188
คำถาม
What quantity is conserved when two solutions are mixed without loss?
คำตอบ
The amount of the pure component. Set the sum of the starting component amounts equal to the final component amount.
การ์ด 189
คำถาม
When may table rows be added directly?
คำตอบ
Only when they are disjoint parts of the same measure and use compatible units. Overlapping groups would be double-counted.
การ์ด 190
คำถาม
What does n! mean for a positive integer n?
คำตอบ
The product of the positive integers from 1 through n.
การ์ด 191
คำถาม
Where is the argument's logical gap?
คำตอบ
Between the evidence and the conclusion. State what must connect them without merely repeating either side.
การ์ด 192
คำถาม
How do you find the number in neither of two sets?
คำตอบ
Subtract the number in the union from the total population.
การ์ด 193
คำถาม
How should rates from table groups be combined?
คำตอบ
Divide the total numerator by the total denominator. Weight a group rate by its group size only when that size is the rate's denominator.
การ์ด 194
คำถาม
What is wrong with moving from some cases to all cases?
คำตอบ
The conclusion is broader than the evidence. Evidence that some members have a trait doesn't show that every member does.
การ์ด 195
คำถาม
When should you use a permutation?
คำตอบ
When selecting and arranging items and order matters. The number of ordered selections of r from n distinct items is n!/(n − r)!.
การ์ด 196
คำถาม
Why does table granularity matter?
คำตอบ
A row-level fact may disappear or change after aggregation. Match the claim to the table’s level of detail.
การ์ด 197
คำถาม
How do you find the probability that an event does not occur?
คำตอบ
1 − P(event). This is often the quickest route for “at least one” questions.
การ์ด 198
คำถาม
Why does a comparable control group help test causation?
คำตอบ
It shows what happened without the suspected cause. If the groups differ mainly in that factor, the result is harder to explain another way.
การ์ด 199
คำถาม
How should missing table entries be treated?
คำตอบ
As unknown unless the notes define another meaning. Exclude or include them only as the question directs.
การ์ด 200
คำถาม
What is the mode of a data set?
คำตอบ
A mode is any value with the greatest frequency. Under the no-mode convention, there is no mode only when at least two distinct values all have equal frequency.
การ์ด 201
คำถาม
What makes a table comparison valid?
คำตอบ
The values must have compatible measures, units, periods, populations, and definitions. Normalize only validly convertible differences; reject differences in population, period, or definition that cannot be reconciled.
การ์ด 202
คำถาม
What should you check when a prediction extends a past pattern?
คำตอบ
Whether the conditions behind the past pattern will continue. A trend alone doesn't show that its causes will remain in place.
การ์ด 203
คำถาม
How should a drain or other undoing process enter a work-rate equation?
คำตอบ
As a negative rate. Add productive rates and subtract rates that reverse the work.
การ์ด 204
คำถาม
How can you avoid losing your place while scanning a table?
คำตอบ
Evaluate one condition at a time and mark qualifying rows mentally or on the scratchpad. Count only after the final filter.
การ์ด 205
คำถาม
Can evidence that an outcome is possible show it is likely?
คำตอบ
No. Possibility only shows that an outcome can occur; probability requires evidence about how likely it is.
การ์ด 206
คำถาม
What correction is needed when counting the union of three sets?
คำตอบ
Add the three individual counts, subtract all three pairwise overlaps, then add the triple overlap back once.
การ์ด 207
คำถาม
When does a filtered table support a decision?
คำตอบ
When the qualifying rows satisfy the stated rule. Keep filtering, calculation, and decision as separate steps.
การ์ด 208
คำถาม
When should you use a combination?
คำตอบ
When selecting items and order does not matter. The number of selections of r from n distinct items is n!/[r!(n − r)!].
การ์ด 209
คำถาม
What must support a recommendation?
คำตอบ
A link from the proposed action to the stated goal. The argument also needs the action to be feasible and free of costs that defeat the goal.
การ์ด 210
คำถาม
How do AND and OR change a table filter?
คำตอบ
AND requires every condition; OR requires at least one. Parenthesize mixed rules before scanning rows.
การ์ด 211
คำถาม
How do you find the probability that independent events both occur?
คำตอบ
Multiply their probabilities: P(A and B) = P(A) × P(B).
การ์ด 212
คำถาม
What can make an alphabetical sort misleading?
คำตอบ
Labels may contain categories or embedded numbers. Confirm whether the column is text, numeric, or chronological.
การ์ด 213
คำถาม
What kind of fact most directly strengthens an argument?
คำตอบ
A fact that supports the missing link between evidence and conclusion. Merely repeating a premise adds little.
การ์ด 214
คำถาม
What is the range of a data set?
คำตอบ
Maximum value minus minimum value.
การ์ด 215
คำถาม
What should you check at a filter cutoff?
คำตอบ
Whether the boundary is inclusive. “At least 40” includes 40; “more than 40” does not.
การ์ด 216
คำถาม
A train covers 150 miles in 3 hours at a constant rate. What is its rate?
คำตอบ
50 miles per hour. Rearrange distance = rate × time to get rate = 150 ÷ 3.
การ์ด 217
คำถาม
What is the most direct way to weaken an argument?
คำตอบ
Undermine a necessary assumption connecting the evidence to the conclusion. The premises can remain true while the conclusion loses support.
การ์ด 218
คำถาม
What does a tie in the sorted column imply?
คำตอบ
The tied rows share rank on that measure. Their display order does not create a performance difference.
การ์ด 219
คำถาม
How do you identify a useful evaluation question?
คำตอบ
Test whether opposite answers would push the argument in opposite directions. If both answers leave the conclusion unchanged, the question isn't useful.
การ์ด 220
คำถาม
What should you identify first in Graphics Interpretation?
คำตอบ
The chart type and what each visual encoding represents. Bars, lines, areas, and points support different readings.
การ์ด 221
คำถาม
How do repeated identical items affect arrangement counts?
คำตอบ
For n total items, divide n! by the factorial of each repeated count. Identical items do not create new arrangements when swapped.
การ์ด 222
คำถาม
What should you read before estimating a plotted value?
คำตอบ
Both axis labels, units, and category order. Position has meaning only after the axes are understood.
การ์ด 223
คำถาม
How do you test whether a statement is a necessary assumption?
คำตอบ
Negate it. If that negation seriously damages the argument, the original statement was necessary.
การ์ด 224
คำถาม
How do you find the probability that one of two mutually exclusive events occurs?
คำตอบ
Add their probabilities: P(A or B) = P(A) + P(B). Their overlap is zero.
การ์ด 225
คำถาม
What should you verify in a chart legend?
คำตอบ
Which color, shape, or line maps to each series. Similar styling can otherwise swap the groups in your interpretation.
การ์ด 226
คำถาม
What does standard deviation measure?
คำตอบ
How spread out values are around the mean. Greater dispersion means a larger standard deviation.
การ์ด 227
คำถาม
What standard should an inference meet?
คำตอบ
It must follow from the given statements, without extra assumptions. Choose the modest claim the evidence guarantees.
การ์ด 228
คำถาม
What does a segment’s share depend on?
คำตอบ
The correct whole. A category’s share of one region may differ from its share of the full dataset.
การ์ด 229
คำถาม
For motion along the same line, when do you add or subtract two speeds to get relative speed?
คำตอบ
Add the speeds for opposite directions; subtract the smaller speed from the larger for the same direction.
การ์ด 230
คำถาม
What must a paradox explanation accomplish?
คำตอบ
Make both surprising facts plausible at the same time. Rejecting either stated fact doesn't resolve the tension.
การ์ด 231
คำถาม
How is a segment in a stacked bar measured?
คำตอบ
Subtract its lower boundary from its upper boundary. The upper endpoint alone is cumulative, not the segment value.
การ์ด 232
คำถาม
Eight students average 70 and twelve students average 80. What is the combined mean?
คำตอบ
- The group sizes are the weights: (8 × 70 + 12 × 80) ÷ 20 = 76.
การ์ด 233
คำถาม
What is the difference between a graph’s level and its rate of change?
คำตอบ
Level is the plotted value; rate of change is the slope. A high line can still be falling.
การ์ด 234
คำถาม
How should you describe a statement's role in an argument?
คำตอบ
Describe what it does, not just what it says. It may support the conclusion, present an objection, answer that objection, or illustrate a principle.
การ์ด 235
คำถาม
What is P(A given B)?
คำตอบ
P(A and B) / P(B), provided P(B) > 0. Restrict the sample space to outcomes in B.
การ์ด 236
คำถาม
How should slope be compared across a graph?
คำตอบ
Use change in vertical value divided by change in horizontal value. Visual steepness is reliable only on the same scales.
การ์ด 237
คำถาม
A driver covers equal distances at 30 mph and 60 mph. Is the average speed 45 mph?
คำตอบ
No. Using 60 miles for each leg gives 120 miles in 3 hours, so the average speed is 40 mph.
การ์ด 238
คำถาม
What should you identify first when evaluating a plan?
คำตอบ
The plan's exact goal and success measure. A proposal can produce benefits yet still fail its stated objective.
การ์ด 239
คำถาม
What does a trend in a scatterplot establish?
คำตอบ
An association in the displayed data. It does not by itself establish causation or predict every individual point.
การ์ด 240
คำถาม
How can you strengthen a causal explanation?
คำตอบ
Rule out a credible alternative cause, support the proposed mechanism, or show the effect changes when the proposed cause changes.
การ์ด 241
คำถาม
How can an outlier affect a graphical trend?
คำตอบ
It can pull a summary line or average away from the main cluster. Check whether the claim concerns all points or the typical pattern.
การ์ด 242
คำถาม
Why do probabilities usually change when sampling without replacement?
คำตอบ
The sample space changes after each draw. Update both the favorable count and the total before multiplying conditional probabilities.
การ์ด 243
คำถาม
One value in an n-value set increases by d. How does the mean change?
คำตอบ
It increases by d/n because the total rises by d while the count stays fixed.
การ์ด 244
คำถาม
When does a counterexample weaken a claim?
คำตอบ
When the claim requires the counterexample not to exist. One genuine exception can defeat an absolute claim, but may barely affect a modest one.
การ์ด 245
คำถาม
What is the parity of the sum of two odd integers?
คำตอบ
Even. Each odd integer is one more than an even integer, so the two extra ones add to 2.
การ์ด 246
คำถาม
What can an aggregate graph hide?
คำตอบ
Differences among subgroups or periods. A stable total can coexist with large offsetting changes inside it.
การ์ด 247
คำถาม
When is interpolation reasonable on a graph?
คำตอบ
When the graph implies continuity between nearby points. Do not interpolate across separate categories.
การ์ด 248
คำถาม
What makes information relevant to evaluating an argument?
คำตอบ
It bears on the uncertain link the conclusion depends on. Interesting facts about the topic may still be logically irrelevant.
การ์ด 249
คำถาม
How precise should a value read from a graph be?
คำตอบ
Only as precise as the scale supports. Use a defensible interval when the mark falls between ticks.
การ์ด 250
คำถาม
Must a necessary assumption prove the conclusion?
คำตอบ
No. It only has to be required for the argument to work; it need not be enough to establish the conclusion on its own.
การ์ด 251
คำถาม
How do you multiply positive numbers written in scientific notation?
คำตอบ
Multiply the coefficients, add the powers of 10, then adjust the coefficient to be at least 1 and less than 10.
การ์ด 252
คำถาม
How should a graph-based decision be made?
คำตอบ
Translate the visual into values or bounds, then apply the stated rule. Do not decide from appearance alone.
การ์ด 253
คำถาม
When is backsolving from answer choices especially useful?
คำตอบ
When the choices are concrete values and direct algebra is slower than testing them in the original conditions.
การ์ด 254
คำถาม
How can axis scale distort a visual impression?
คำตอบ
Unequal intervals or a truncated baseline can magnify or compress differences. Use tick values, not apparent distance alone.
การ์ด 255
คำถาม
When should you combine two statements for an inference?
คำตอบ
When they share a term or relationship that creates a guaranteed consequence. Don't combine them through an unstated causal or statistical link.
การ์ด 256
คำถาม
When is a product of integers odd?
คำตอบ
Only when every factor is odd. One even factor makes the entire product even.
การ์ด 257
คำถาม
What often resolves two apparently conflicting results?
คำตอบ
A hidden difference in group, time, measurement, or conditions. The results may describe different slices of the situation.
การ์ด 258
คำถาม
How should equal distances on a logarithmic axis be interpreted?
คำตอบ
As equal multiplicative changes, not equal absolute changes. Read the labeled values before comparing gaps.
การ์ด 259
คำถาม
Why start with a middle answer choice when backsolving ordered options?
คำตอบ
Its result often eliminates half the choices at once when the relationship is monotonic.
การ์ด 260
คำถาม
What makes a Two-Part Analysis response complete?
คำตอบ
Both selections must satisfy their own column prompts under the same stem. Treat the pair as one submitted response.
การ์ด 261
คำถาม
What is an analogy doing when it supports a claim?
คำตอบ
It argues that because two cases share relevant features, a result or principle from one likely applies to the other.
การ์ด 262
คำถาม
How do you represent three consecutive odd integers?
คำตอบ
n, n + 2, and n + 4, where n is an odd integer.
การ์ด 263
คำถาม
What should you identify before solving Two-Part Analysis?
คำตอบ
The role of each column. One may ask for a condition while the other asks for a consequence or decision.
การ์ด 264
คำถาม
What values should you test first in a claim about an unspecified number?
คำตอบ
Test allowed categories that may behave differently: positive, negative, zero, fractional, and boundary values.
การ์ด 265
คำถาม
How can an unchanged bottleneck defeat a plan?
คำตอบ
Improving a nonlimiting step won't improve the final outcome if another constraint still controls it. Faster ordering doesn't help when production is already full.
การ์ด 266
คำถาม
How does the shared stem affect the two parts?
คำตอบ
Its definitions and constraints apply to both. Keep them fixed while testing each column’s requirement.
การ์ด 267
คำถาม
How do you count the positive divisors of an integer greater than 1 from its prime factorization?
คำตอบ
Add 1 to each prime exponent, then multiply those results.
การ์ด 268
คำถาม
In Two-Part Analysis, must the two selected entries be the same?
คำตอบ
In the current format, the two selected entries may be the same or different. A linkage in the stem determines whether you must reason through them jointly, not whether their values match.
การ์ด 269
คำถาม
What makes evidence for a general claim strong?
คำตอบ
It should be relevant and reliable and, if case-based, come from representative cases. More evidence isn't automatically better evidence.
การ์ด 270
คำถาม
How do you factor a difference of squares?
คำตอบ
Use x² − y² = (x − y)(x + y).
การ์ด 271
คำถาม
When should the two Two-Part Analysis selections be solved together?
คำตอบ
When one shared relationship constrains both. Test candidate pairs against that relationship instead of solving isolated fragments.
การ์ด 272
คำถาม
How can one counterexample evaluate a universal claim?
คำตอบ
One valid counterexample disproves a claim that is supposed to hold for every allowed value.
การ์ด 273
คำถาม
How does an alternative explanation weaken a conclusion?
คำตอบ
It shows that the evidence can be true without the proposed explanation being true. The alternative must account for the same result.
การ์ด 274
คำถาม
In Two-Part Analysis, how can one column help solve the other?
คำตอบ
A valid selection can narrow the remaining candidates when the parts share a constraint. Recheck the final pair in both columns.
การ์ด 275
คำถาม
How do you test whether x² + bx + c factors into integer binomials?
คำตอบ
Look for integers r and s with r + s = b and rs = c. If they exist, the factorization is (x + r)(x + s).
การ์ด 276
คำถาม
Which unknown should you evaluate first in a plan argument?
คำตอบ
A condition that could make the plan achieve or miss its goal. Focus on feasibility, response, costs, and side effects tied to that goal.
การ์ด 277
คำถาม
How should a trade-off between two measures be evaluated?
คำตอบ
Apply the stated priorities or limits. An option is better only relative to the rule, not because one measure is largest.
การ์ด 278
คำถาม
How can estimation screen answer choices before exact calculation?
คำตอบ
Approximate the expression's magnitude, then eliminate choices that are far too large or too small.
การ์ด 279
คำถาม
In a constrained-decision Two-Part Analysis problem, what should you check before comparing candidates?
คำตอบ
Check every hard constraint first. Discard any option that breaks a required limit, then compare only the feasible candidates.
การ์ด 280
คำถาม
What does a defensive assumption do?
คำตอบ
It rules out a threat that would break the argument. For example, a revenue plan may assume that its added costs won't exceed the new revenue.
การ์ด 281
คำถาม
What restriction applies when a variable appears in a denominator?
คำตอบ
Exclude every value that makes the denominator zero.
การ์ด 282
คำถาม
How does an objective differ from a constraint?
คำตอบ
A constraint determines what is allowed; an objective ranks the allowed options. Apply them in that order.
การ์ด 283
คำถาม
Which quick checks catch many Quant answer errors?
คำตอบ
Check the sign, units, allowed range, and rough size against the question's conditions.
การ์ด 284
คำถาม
What inference is safe from a statement about most members?
คำตอบ
More than half have the stated trait. You can't infer that all do, that any particular member does, or that most have another trait.
การ์ด 285
คำถาม
How should a two-part threshold rule be handled?
คำตอบ
Translate each threshold with the correct inequality, including its boundary. Then test both selected values against it.
การ์ด 286
คำถาม
Where can one negative sign appear in a fraction without changing its value?
คำตอบ
Before the fraction, in the numerator, or in the denominator: −(a/b) = (−a)/b = a/(−b), provided b ≠ 0.
การ์ด 287
คำถาม
How does an argument choose between competing explanations?
คำตอบ
It presents evidence that one explanation handles better than the others, often by ruling out a rival prediction.
การ์ด 288
คำถาม
What is an efficient way to handle two linked algebraic targets?
คำตอบ
Express both in terms of one variable or invariant. Evaluate candidate values only after the relationship is clear.
การ์ด 289
คำถาม
How do you solve x² = c over the real numbers?
คำตอบ
If c > 0, x = ±√c; if c = 0, x = 0; if c < 0, there is no real solution.
การ์ด 290
คำถาม
What should you check when two selected quantities form a ratio?
คำตอบ
Order and scale. The ratio A:B is not interchangeable with B:A, and proportional pairs may all fit.
การ์ด 291
คำถาม
How does a positive proper fraction compare with 1?
คำตอบ
It is less than 1 because its numerator is smaller than its denominator.
การ์ด 292
คำถาม
Which side effects matter when evaluating a plan?
คำตอบ
Effects that change the plan's net result or work against its goal. A small unrelated inconvenience usually doesn't matter.
การ์ด 293
คำถาม
How should a two-part logical claim be tested?
คำตอบ
Separate the condition from the conclusion, then test whether each selected statement performs the requested role.
การ์ด 294
คำถาม
What is the solution pattern for |x| = a over the real numbers?
คำตอบ
If a > 0, x = ±a; if a = 0, x = 0; if a < 0, there is no real solution.
การ์ด 295
คำถาม
What unit check belongs in a two-part quantitative answer?
คำตอบ
Confirm that each selection has the unit requested by its column. Linked values may require different conversions.
การ์ด 296
คำถาม
Why does user response matter to a plan?
คำตอบ
The plan may depend on people adopting, following, or not avoiding it. Availability alone doesn't guarantee the needed behavior.
การ์ด 297
คำถาม
A response rate rises from 40% to 50%. What are the percentage-point change and the relative percent increase?
คำตอบ
The increase is 10 percentage points and 25% relative to the original rate: (50 − 40) ÷ 40 = 0.25.
การ์ด 298
คำถาม
What is the final check for Two-Part Analysis?
คำตอบ
Read each column prompt with its chosen entry, then verify that the pair is jointly consistent with the stem.
การ์ด 299
คำถาม
For real x and y, what two linear cases are equivalent to x² = y²?
คำตอบ
x = y or x = −y.
การ์ด 300
คำถาม
How should benefits and costs be compared in a plan argument?
คำตอบ
By their net effect on the stated goal. A plan can create the intended benefit but still fail if its relevant costs are larger.
300 การ์ด
GMAT Flashcards: Quant, Verbal & Data Insights Decisions
Nibomo จะเปิดขึ้นเพื่อให้คุณเริ่มเรียนได้ทันที