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.
A sentence in English can end in just 3 ways: period, question-mark, or exclamation mark!
In DS, beware of "exceptions".
Q. Is X positive?(1) |X| = X.
Because of the exception "X = 0" case, this statement is insufficient.
"Confusing-correlation-with-causation"
A favorite GMAT CR fallacy.
Example: Grandma sneezed, so a tornado hit Nebraska.
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".
RCs make or break your GMAT.Practice RCs everyday!
A fraction will terminate if its denominator has no prime factor other than 2 or 5.
17/160Prime factors of "160" are "2" and "5". So, this fraction WILL terminate.
13/480One of the prime factors of "480" is "3".So, this will NOT terminate.
Don't exhaust official material early- it's a common mistake.Save it for the last few weeks.
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".
RCs make or break your GMAT.Practice RCs everyday!
Don't exhaust official material early- it's a common mistake.Save it for the last few weeks.
"between" is used when "two elements" are involved."among" is used when "more than two elements" are involved.
120
Jack wishes that he was an athlete. : IncorrectJack wishes that he were an athlete. : Correct
A subjunctive mood construction - (wish + plural form of verb)
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