The GMAT

Data Sufficiency Practice Quesitons

Directions: In each of the problems, a question is followed by two statements containing certain data. You are to determine whether the data provided by the statements is sufficient to answer the question.

Answer choices:

A. if statement (1) by itself is sufficient to answer the question, but statement (2) by itself is not;

B. if statement (2) by itself is sufficient to answer the question, but statement (1) by itself is not;

C. if statements (1) and (2) taken together are sufficient to answer the question, even though neither statement by itself is sufficient;

D. if either statement by itself is sufficient to answer the question;

E. if statements (1) and (2) taken together are not sufficient to answer the question, requiring more data pertaining to the problem

Questions

1. Does x = y?

(1) x² - y² = 0

(2) (x - y)² = 0

A.
B.
C.
D.
E.

2. If R is an integer, is R evenly divisible by 3?

(1) 2R is evenly divisible by 3

(2) 3R is evenly divisible by 3

A.
B.
C.
D.
E.

3. If he did not stop along the way, what speed did Bill average on his 3-hour trip?

(1) He traveled a total of 120 miles.

(2) He traveled half the distance at 30 miles per hour, and half the distance at 60 miles per hour.

A.
B.
C.
D.
E.

4. Is x + y positive?

(1) x - y is positive.

(2) y - x is negative.

A.
B.
C.
D.
E.

5. A shopper bought a tie and a belt during a sale. Which item did he buy at the greater dollar value?

(1) He bought the tie at a 20 percent discount.

(2) He bought the belt at a 25 percent discount

A.
B.
C.
D.
E.