Sum of the digits of a two digit number is 9. The number obtained by interchanging the digits exceeds the given number by 27. Find the original number.
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63, And 6+3 is equal to 9, and after interchanging it become 36, which is 27more then 9
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10x+y+27=10y+x..x+y=9..x=3.y=6..answer is 36
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