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Find two consecutive natural numbers whose product is 20. |
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Answer» Let a natural number be x. The next number = x + 1 x (x + 1) = 20 x2 + x – 20 = 0 (x + 5)(x – 4) = 0 x = -5, 4 ∴ x = 4 (∵ x ≠ -5, x is natural number) The next number = 4 + 1 = 5 Two consecutive numbers are 4, 5 |
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