The sum of three consecutive natural numbers each divisible by 3 is 72. What is the largest among them ?

A. 21

B. 30

C. 27

D. 30

Answer : C. 27

Explanation:

Let us take three consecutive numbers which are divisible by 3 are, 3x, 3x + 3 and 3x + 6.
3x + (3x + 3) + (3x + 6) = 72
9x + 9 = 72
9x = 63
i.e. x = 7
so, the numbers are 21, 24 and 27

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