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1. If you write down all the numbers from 1 to 100, then how many times do you write 3 ?





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  • By: guest on 02 Jun 2017 02.07 am
    Clearly, from 1 to 100, there are ten numbers with 3 as the unit's digit- 3, 13, 23, 33, 43, 53, 63, 73, 83, 93; and ten numbers with 3 as the ten's digit - 30, 31, 32, 33, 34, 35, 36, 37, 38, 39.So, required number = 10 + 10 = 20.
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