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alex.gellatly
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Statement 1: n(n + 2) = 15alex.gellatly wrote:What is the value of the integer n?
1. n(n+2) = 15
2. (n+2)^n = 125
--> (n² + 2n - 15) = 0
--> (n - 3)(n + 5) = 0
Hence, n = 3 or n = -5
Not sufficient
Statement 2: (n + 2)^n = 125
Now, n (n + 2) both are integers.
And we can write 125 as an integer raised to the power of integer in only one way, 5^3.
Hence, n = 3.
Sufficient
The correct answer is B.
