Data Sufficiency

What is the value of the integer n?
(1) n(n + 2) = 15
(2) (n + 2)n = 125

(1) If n is +ve , n can be 5,3
n is -ve , n is -5 Insufficient.
(2) (n+2)n = 125 => n²+2n-125= 0
we know if the eq is of the form ax²+bx +c = 0
the roots are -b x = - b ± √(b2- 4ac) / 2a
√(b2- 4ac) in this equation will not give us intergers as roots as it is √(2 ² - 4*1* (-125)) =√4+4*125=2√(124)
Insufficient.

Seems I am going tangent or something wrong with the Q.

gmatmachoman wrote:What is the value of the integer n?
(1) n(n + 2) = 15
(2) (n + 2)n = 125

As soon as we determine that (2) has no integer roots, we determine one other thing:

this is NOT a question that would ever appear on the GMAT.

Every DS value question must have at least 1 viable value (by the rules of the test).

What's the source?

Stuart,

I am really sorry for saying this..I forgot the source...Else I wuld have posted it...Plz !