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Using the prime factorisation method, find which of the following number are not perfect square 400 |
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Answer» Answer: the PRIME factors of each of the numbers as follows : 400 = 2 × 2 × 2 × 2× 5 × 5 = 2⁴ × 5² The prime factors have even powers HENCE 400 is a PERFECT SQUARE. |
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