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Find the smallest number which is divisible by 12, 15, 20 and also is a perfect square?1. 16002. 9003. 36004. 400 |
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Answer» Correct Answer - Option 2 : 900 Calculation: LCM of 12, 15 and 20 by prime factorization method 12 = 2 × 2 × 3 15 = 3 × 5 20 = 2 × 2 × 5 LCM = 2 × 2 × 3 × 5 ⇒ 60 The smallest number which is divisible by 60 and is a perfect square = 60 × 15 ⇒ 900 ∴ The required number is 900 |
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