Bunuel wrote:

Which of the following is NOT a difference between two perfect squares?

A. 5

B. 7

C. 8

D. 13

E. 18

Hi

BunuelI think the question is missing something here.. because all the options are difference between two perfect square

NUMBERS.

chetan2u Can you please let me know if I am missing anything here.

A. \((a+b)(a-b) = (3+2)(3-2) = 5\)

B. \((a+b)(a-b) = (4+3)(4-3) = 7\)

C. \((a+b)(a-b) = (3+1)(3-1) = 8\)

D. \((a+b)(a-b) = (7+6)(7-6) = 13\)

E. \((a+b)(a-b) = (5\sqrt{2} + 4\sqrt{2})(5\sqrt{2}-4\sqrt{2}) = 18\)

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