Which is the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ? *

Which is the least number which when double will be exactly divisible by 12, 18, 21 and 30? [A]196 [B]630 [C]1260 [D]2520

630 The LCM of 12, 18, 21, 30 is 1260. ∴ The required Number = $latex = \frac{1260}{2} = 630&s=1$

Hence option [B] is correct answer.

Answered by Guest on 2018-01-20 03:45:12 | Votes 0 | #

option 3 is the correct answer as per the answer key

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Answered by Guest on 2018-04-09 19:25:03 | Votes 0 | #

The LCM of 12, 18, 21, 30 LCM = 2 × 3 × 2 × 3 × 7 × 5= 1260 The required number $\frac{1260}{2}$ = 630

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