the ratio of a two digit number to the number obtained by reserving its digit is 4:7 if the sum of its digits is 9 find the number
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Ratio Proportion Let the two digit number be 10a + b and the number formed by reversing its digits be 10b + a. 10a + b 10b + a = 4 7 70a + 7b = 40b + 4a 66a = 33b Therefore, a b = 1 2 The ratio of a two-digit natural number to a number formed by reversing its digits is 4 : 7.
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