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 Find fhe least square number which is exactly divisible by 10, 12, I5 and 18.

Answer:

Explanation:

L.C.M. of 10, 12, 15, 18 = 180.

$ Now, 180 = 2 x 2 x 3 x 3 x 5 = 2^{2} x 3^{2} x 5.$

To make it a perfect square, it must be multiplied by 5.
$ Required number = (2^{2}X3^{2}X5^{2}) = 900.$