Q17 of 84 Page 5

How many numbers of two digit are divisible by 3? (CBSE 2012)

Two digit numbers divisible by 3 are 12, 15, 18,… ,99

Hence, a= 12, ,d=3


an= a + (n -1)d


99= 12(n -1)3


99= 9 = 3n


n=30


Hence, the total numbers of two digit divisible by 3 are 30.

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