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".
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.
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.
You should regularly revisit SC concepts.Make SC Stage-1 videos and GMAT Shots your good friends!
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.
Do not chase "tricks/tips/shortcuts". Chase "concepts"!Do not chase "scores", chase "learning". Scores will follow.
Circular arrangements:
"N" entities can be arranged on a circle in (N-1)! ways.
“And” is the only conjunction that can join two singular nouns and make them plural.
Jack and Joe are studying. - CorrectJack along with Joe is studying. - Correct
"Incorrect Analogy"- The fallacy of drawing comparison between dissimilar entities.Or, without establishing similarity.
A favorite GMAT CR fallacy.
Example: Country X increased import tariffs and achieved good results; country Y must increase import tariffs.
1-week gap in prep hurts your progress by 3-weeks.
Do not chase "tricks/tips/shortcuts". Chase "concepts"!
Do not chase "scores"; chase "learning". Scores will follow.