the sum of the digits of a two digit no is 13.If the number is subtrated from the one obtained by interchanging the digits,the result is 45.What is the number?
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The sum of two digit number is 13 . if the number is subtracted from the one obtained by interchanging the digits the results is 45 . The two digits be x and y. The two-digit number = 10x + y = (10 × 4) + 9 = 49.
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