Question
The least perfect square , which is divisible by each of 21, 36 and 66 , is :
Answer: Option A
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L.C.M. of 21, 36, 66 = 2772, Now 2772 = 2 x 2 x 3 x 3 x 7 x 11
To make it a perfect square it must be multiplied by 7 x 11 .
So required number = `2^2xx 3^2 xx 7^2 xx 11^2` = 213444
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