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Which of the following is a perfect square?1. 19352. 15203. 7304. 1681 |
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Answer» Correct Answer - Option 4 : 1681 Concept used: Perfect square should have a pair of each prime factor Calculation: 1935 = 3 × 3 × 5 × 43 1520 = 2 × 2 × 2 × 2 × 5 × 19 730 = 2 × 5 × 73 1681 = 41 × 41 Here, only 1681 has a pair of each prime factor ∴ The perfect square is 1681 |
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