Question

find the smallest perfect smallest perfect square number which is exactly divisible by 8, 15 and 20​

Answer 1

The number that is perfectly divisible by each of the numbers 8,15 and 20 is their LCM. Here prime factors 2,3 and 5 donot have their respective pairs. Therefore 120 is not a perfect square. Therefore 120 should be multiplied by 2×3×5 that is 30 to obtain a perfect square.

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