Square Root and Cube Root - General Aptitude

Q1:

The square root of (7 + 35) (7 - 35) is

A 5

B 2

C 4

D 35

ANS:B - 2

(7 + 35)(7 - 35)=(7)2 - (35)2 = 49 - 45  = 4  = 2.