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For a positive integer n, what is the remainder when n(n + 1) is divided by 12?
1) n is divisible by 3.
2) n is divisible by 4.
The OA is C.
I solve this question as follows,
12 = 4*3
We need to know if n is divisible by 4 and 3.
Statement 1: Insufficient. Since we don't know about n is divisible by 4.
Statement 2: Insufficient. Since we don't know about n is divisible by 3.
Both: Sufficient. n is divisible by 4 and 3, i.e n ( n+1) is divisible by 12. Hence C is the correct answer.
1) n is divisible by 3.
2) n is divisible by 4.
The OA is C.
I solve this question as follows,
12 = 4*3
We need to know if n is divisible by 4 and 3.
Statement 1: Insufficient. Since we don't know about n is divisible by 4.
Statement 2: Insufficient. Since we don't know about n is divisible by 3.
Both: Sufficient. n is divisible by 4 and 3, i.e n ( n+1) is divisible by 12. Hence C is the correct answer.
