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1. What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?





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  • By: guest on 01 Jun 2017 05.48 pm
    L.C.M. of 12, 18, 21 30 2 | 12 - 18 - 21 - 30 ---------------------------- = 2 x 3 x 2 x 3 x 7 x 5 = 1260. 3 | 6 - 9 - 21 - 15 ---------------------------- Required number = (1260 ? 2) | 2 - 3 - 7 - 5 = 630.
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