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The least perfect square, which is divisible by each of 21, 36 & 66 is
214344
214434
213444
231444
LCM of 21, 36, 66 is 3^2, 2^2, 7, 11.
So the smallest perfect square should be 3^2 x 2^2 x 7^2 x 11^2 = 213444
Hence, option 3 is the correct answer.
By: MIRZA SADDAM HUSSAIN ProfileResourcesReport error
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