If x is a positive integer, is (x)^0.5 an integer?
(1) (4x)^0.5 is an integer
(2) (3x)^0.5 is NOT an integer
(1) (4x)^0.5 is an integer
(2) (3x)^0.5 is NOT an integer
Answer is A.
2 * x^0.5 can only be an integer if x^0.5 is an integer.
( options A, D are only possibility now)
where as 3^0.5 * x^0.5 doesnt tell us anything thing about x^0.5 as 3^0.5 is not an integer hence the product is non integer.
This rules out D.
