SSC CPO SI and ASI Model Paper 2

Question : 119 of 200

Marks: +1, -0

If n is a natural number, then

(3n^2 + 3n)

is always divisible by

Solution:

(2)

(3n^2 + 3n) = 3n(n + 1)3n(n + 1)

is divisible by 3 and 6 [asn(n + 1) is always an even number].

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