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GMAT: Data Sufficiency
A test by
Oren Lahav
.
Test Questions
Question
This quick GMAT Review Test covers only the data-sufficiency questions in the Quantitative section of the GMAT. You should take this test to see how ready you are to confront that section of the test. Note that a calculator is NOT allowed. All of these problems consist of a question and two statements. You have to decide whether the data given in the statements, together with knowledge of general math and everyday facts, are
sufficient
for answering the question.
Question:
How many pounds did I lose after my last diet?
1. I lost 10% of my original weight.
2.After the diet, I weighed 170 pounds.
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Question
If r-s=400, does r=300?
1. r=-3s
2. s=150
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Question
I have 16 sheep, some of which are white and some are black. How many are black?
1.The number of white sheep is higher than the number of black ones by 2.
2.The number of white sheep is odd.
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Question
None of a,b,c and d are 0. Is ab positive?
1. ac is positive
2. bd is negative
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Question
A and B are positive integers. Is A a factor of 24?
1.AB is a factor of 24
2. B=4.
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Question
I have to borrow a book, which I can do either at school or at the library. Which one is closest to my home?
1. It takes me half an hour to drive to school from my home.
2.It takes me one hour to get to the library from my school.
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Question
Does
?
1.m-n=109
2.m+n=0.
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Question
Is a>1?
1. 0 < sqrt(a) < 1
2. (a^2)=4.
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Question
x and y are positive integers. Is the product xy odd?
1. x=5
2. x and y are consecutive integers.
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Question
If k is an integer, is k * |k| < 2 ^ k ?
1. k < 0
2. k = - 10
Answers
Correct
Answer Text
A. Statement 1 ALONE is sufficient, but statement 2 alone is not sufficient
B. Statement 2 ALONE is sufficient, but statement 1 alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
D. EACH statement ALONE is sufficient
E. Statements 1 and 2 TOGETHER are NOT sufficient
Answer
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