1.

Find the smallest number which is divisible by 12, 15, 20 and also is a perfect square?1. 16002. 4003. 9004. 3600

Answer» Correct Answer - Option 3 : 900

Concept used:

LCM will be the smallest number divisible by all of the numbers and the required answer will be the multiple of LCM

Calculation:

12 = 2 × 2 × 3

15 = 3 × 5

20 = 2 × 2 × 5

LCM = 2 × 2 × 3 × 5

⇒ 60

Out of the 4 options, 900 is the multiple of 60 and also a perfect square

∴ The smallest number which is divisible by 12, 15 and 20 and also is a perfect square is 900



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