Find the least square number, which is exactly divisible by each one of the numbers 12, 15, 18.
pls explain answer should come 900
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L.C.M. of 10 12 15 18 = 180. Now 180 = 2 * 2 * 3 * 3 *5 = 22 * 32 * 5. To make it a perfect square it must be multiplied by 5. Required number = 22 * 32 * 52 = 900.
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