Question

sum of the digits of a two digit no. is 9,when we interchange the digits,it is found that the resulting new nu. is greater than the original nu. by 27. what is the original no.?

Answer 1

36 is the digit ok
let the digits be x and 9-x
10x +9-x+27=90-10x+x
9x+10x-x=90-27-9
18x=54
x=3
so 10x+6
36 is the number
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