DS Question - 19

Is x = square root (x^2) if

(1) x = even
(2) 13 is less than x is less than 17

Answer: B

From Statement (1) -- x = even . Always remember square root (x^2) = mod x.
E.g - squareroot (-4 ^ 2) = 4 ; suareroot (4^ 2) = 4. Hence 1 is insufficient.

From Statement (2) --13 is less than x is less than 17 implies that x can be 14, 15 or 16 ..hence X IS POSITIVE...Hence sufficient.

Note : Is x = square root (x^2) is equivalent to stating Is x = mod x