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Q.
If n is natural number , then (6n2+6n) is always divisible by :
A.
6 only
B.
6 and 12 both
C.
12 only
D.
by 18 only
View Answer
Correct choice: B
Explanation:
(6n2+6n)=6n(n+1), which is always divisible by 6 and 12 both, since n(n+1) is always even.
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