* What is the value of integer n?

[RD]

Hi,

Please help me with this DS problem.

What is value of integer n?

(1) n(n+2) = 15

(2) (n+2)^n = 125

According to me ans is

B. Statement (2) alone is sufficient, but statement (1) alone isn't.

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(Statement 1)

n(n+2) = 15

quatratic equation with two roots, n = -5 or n = 3. (Hence not sufficient)

(Statement-2)
(n + 2)^n = 5^3

(n + 2)^n = (3 + 2)^3

Since n is an integer, the only possible value for n is 3; any other value will not satisfy the equation (statement 2).

[Chak De]

What is the other solution ?

[JonathanSchneider]

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