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How many numbers of two digit are divisible by 3?

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How many numbers of two digit are divisible by 3?

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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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