Question

He least perfect square, which is divisible by each of 21, 36 and 66 is:

Answer 1

First take out the LCM of these numbers.
LCM of 21,36,66 =

$2 \times 2 \times 3 \times 3 \times 7 \times 11 = 2772$
as the 7 and 11 comes one time.
So by multiplying the LCM with 7 and 11 we will get the perfect square.

$2772 \times 7 \times 11 = 213444$
Hence, 2,13,444 is the answer.

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