The least perfect square, which is divisible by each of 21, 36 and 66 is ?
A. 13414
B. 213424
C. 213434
D. 213444
Answer : D. 213444
Explanation:
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 x 2 x 3 x 3 x 7 x 7 x 11 x 11 = 213444
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