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1. How many natural numbers are there between 23 and 100 which are exactly divisible by 6 ?






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  • By: guest on 01 Jun 2017 05.46 pm
    Required numbers are 24, 30, 36, 42, ..., 96 This is an A.P. in which a = 24, d = 6 and l = 96 Let the number of terms in it be n. Then tn = 96    a + (n - 1)d = 96 24 + (n - 1) x 6 = 96 (n - 1) x 6 = 72 (n - 1) = 12 n = 13 Required number of numbers = 13.
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