required number is 224.
EXAMPLE 7
Find the smallest perfect square divisible by 2, 3, 4 and 5.
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Here, prime factors 2, 3 and 5 have no pair. Therefore 120 must be multiplied by 2 x 3 x 5 to make it a perfect square. Hence, the smallest square number which is divisible by 8, 15 and 20 is 3600
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