Question

A number consist of two digit whose sum is 8 if 18 is added to it then its digit be reve rsed . Find the number.

Answer 1

let the ones place digit be x, then the tens place digit=8-x
the number can now be written as x+10(8-x)
its reverse will be 10x+8-x
=>x+10(8-x)+18=10x+8-x
then by solving we get x=4, then by substituting, the number comes 44