LCM and HCF Practice Test 5

Question : 11 of 33

Marks: +1, -0

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

Solution:

LCM of 12, 18, 21 and 30 is 1260
Hence, required number

= 1/2×1260 = 630.

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