Question

The sum of a digits of a two digits number is 10.if 18 be substituted from it the digits in the resulting number will be equal.the number is

Answer 1

The answer is 73
as 7+3=10
73 - 18 =55

Answer 2

we can get the answer by trial and error method .7+3=10,73 -18=55 or else let the numbers be x,10-x and the value of x is 10x as it is in tens place ,10x +10-x-18 is the equation i.e 9x-8 = a number with same digits by trial and error method we get the answer