Scott Woodbury-Stewart

GMAT OFFICIAL GUIDE PS – Which of the following expressions can be…

Which of the following expressions can be…

Solution:

Let’s simplify the expressions in each Roman numeral to see which of them must be an integer.

I.

(√82 + √82)^2

(2√82)^2

4 x 82 = 328

I is an integer.

II.

82 * √82

82√82

II is not an integer since √82 is not an integer.

III.

(√82 * √82)/82

82/82 = 1

III is an integer.

Answer: Both I and III can be written as an integer.

Leave a Reply