GRE Quantitative Practice Questions — Quantitative Comparison Format

Directions  |  Question  »  1   2   3   4   5   6   7   8

Question 8

a – b = ½
Quantity A

 a2 – 2ab + b2

Quantity B

¼

(A) Quantity A is greater.
(B) Quantity B is greater.
(C) The two quantities are equal.
(D) The relationship cannot be determined from the
             information given.

Answer and Analysis

The correct response is (C). Since a2 – 2ab + b2 = (a – b) 2 = , the two quantities must be equal.