In DS, when you are able to solve "too easily", you are probably missing a trap.
Q. Which integer is the highest common factor of four positive integers A, B, C, and D?(1) A= 27, B=49.
Unlike what many students will think, this statement is "Sufficient". Because no matter what "C" and "D" are, if HCF of "A" and "B" is 1, the answer is going to be "1".
"The fallacy of drawing a conclusion based on one entity’s comparison with oneself"
-A favorite GMAT CR fallacy.
Example: Jack improved his score by 200%. Inference: Jack performed well. - Incorrect
Jack wishes that he was an athlete. : IncorrectJack wishes that he were an athlete. : Correct
A subjunctive mood construction - (wish + plural form of verb)
In DS, "combine" the two statements only when each statement fails alone.
Q. If X is an integer, is X a multiple of 12?(1) Two of the factors of X are 5 and 7.(2) X is a product of two odd integers.
The answer is not C. The answer is B.
"Confusing-cause-with-effect"
A favorite GMAT CR fallacy.
Example: Every time I dream, I sleep.
In DS, an answer is achieved only when the answer is "consistent".
Q. Is X a multiple of 24?(1) X is a multiple of 6.(2) X is a multiple of 4.
X = 24 satisfies both (1) and (2), leads to "Yes".X = 12 satisfies both (1) and (2), leads to "No"."Inconsistent". Hence, insufficient. Answer is E.
MedianThe middle value that separates the greater and lesser halves of a set.
To find the median, first arrange the terms in a set in increasing (or decreasing) order.If the number of terms in the set is odd, the median is [(n + 1)/2]th term.If the number of terms in the set is even, the median is the mean of (n/2)th term and (n/2 + 1)th term.
"model...after" is a correct, idiomatic usage
Sara modeled the statue after her mother. : Correct
Difference between "Inference" and "Conclusion" on CR:
- Inference is any statement that can be derived from the passage, without any assumptions or extrapolations- Conclusion is the main point of the passage.
- "Conclusion" is a subset of "Inferences".-- The "main inference".
The mind-map-strategy for RCs
1.Skim through the first paragraph.Take your eyes off the screen.
2. Ask yourself the paragraph's "purpose" .Purpose is always very, very brief.Avoid paraphrasing the details.
3. Skim through the next paragraph.Take your eyes off.Ask yourself the paragraph's "purpose".Link the purpose of the first paragraph with that of the second.
4. Keep repeating Step 3 for all the subsequent paragraphs.
While attempting AWA, type the first and the last paragraphs first.
- This will ensure that your essay will look 'complete', even if you run out of time.- This will give you more time to think about the middle paragraphs.
Comma followed by present participle (verb+ing) generally leads to a cause-effect relationship.
Example:Jack performed brilliantly, leaving the audience delighted.
120
"Confusing-correlation-with-causation"
A favorite GMAT CR fallacy.
Example: Grandma sneezed, so a tornado hit Nebraska.
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