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Question
What will be the least number which when doubled will exactly be divisible by 12, 18, 21 and 30?
What will be the least number which when doubled will exactly be divisible by 12, 18, 21 and 30?
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Solution
The correct option is B 630
L.C.M. of 12, 18, 21, 30 = 2 x 3 x 2 x 3 x 7 x 5 = 1260.
∴ Required number = (1260 / 2) = 630.
630
L.C.M. of 12, 18, 21, 30 = 2 x 3 x 2 x 3 x 7 x 5 = 1260.
∴ Required number = (1260 / 2) = 630.
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