The sum of the digits of a 2- digits number obtained by interchanging the digits exceed the given number by 18 . Find the given number​

Answers (1)

Given number is = ab

10a + b + 18 = a + 10b

9(b-a)= 18

b-a = 9

so digits are 0 and 9.

Sum of the digit = 0+9 = 9

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