The difference between a 2-digit number and the number obtained by interchanging its digits is 63. What is the difference between the digits of the number?
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the difference between two digit number and the number obtained by interchanging it's digits is 63. As the original number is 10 x + y. Then it's interchange will be 10 y + x. ... Hence, the difference between the two digit number and the number obtained by interchanging its digits is 7.
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