Powers and Roots Practice Test 2

Question : 2 of 40

Marks: +1, -0

Find the smallest number which is divisible by 12, 15, 20 and is a perfect square.

Solution:

LCM of 12, 15 and 20

To make the LCM a perfect square, we multiply it with 3 and 5

= 2 × 2 × 3 × 3 × 5 × 5 = 900

Perfect square of 30 is 900.

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