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How many two digit numbers are divisible by 3 |
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Answer» Let two digit numbers are 10, 11, 12 , -------------99which are divisible by 3 are 12, 15 ...............,99.Here a = 12 and common dofference = 3 , an\xa0= l = 99nth\xa0term (tn) = a + ( n - 1) d⇒ 99 = 12 + ( n - 1) 3⇒ (n - 1)3 = 99 - 12 = 87⇒ ( n -1) = 87 / 3⇒ n - 1 = 29∴ n = 30∴ 30 two digit numbers which are divisible by 3. 33 |
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