Question

the sum of the digit of 2 digit no is 9 . If the no formed by reversing the digits is less than the original no by 45 then the original no is
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Answer 1

Answer:

If you call the first digit of the original question “x” and the second digit “y”, the difference between 10y+x and 10x+y is 45. 10y+x-10x-y = 9y-9x = 45, so y-x = 5

We already know that x + y = 9, and if y-x = 5, 2y = 14, so y = 7, and x = 2.

27 is the answer