Question: Is X = 7?(1): X is not a prime number.(1) is sufficient. Because (1) leads to "No, X is not equal to 7".
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".
"Like" is used for "comparing nouns"."As" is used for "comparing actions"."Such as" is used for "giving examples".
Angle from a chord at any point on the circumference is the same.
Spot the error: Teacher taught that the Earth revolved around the sun.
"revolved" is not correct. It must be "revolves".(Universal truths are always conveyed in simple present tense).
"Circular Reasoning"- The fallacy of assuming a conclusion to be true, in reaching the conclusion.
A favorite GMAT CR fallacy.
Example: Jack cannot lie because Jack always tells the truth.Example: A is true because B is true; B is true because A is true.
RCs make or break your GMAT.Practice RCs everyday!
1-week gap in prep hurts your progress by 3-weeks.
Sum of a diminishing infinite series:
S = a / (1 - r)a: the first term in the progressionr: the common ratio
120
"Confusing-cause-with-effect"
A favorite GMAT CR fallacy.
Example: Every time I dream, I sleep.
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