Question

The sum of a 2 digit no. and the no. obtained by reversing the order of its digit is 165.If the digits differ by 3,find the no

Answer 1

let the digit be x and y
no.=10x+y
a.t.q.
x+y=165 eq.1
x-y=3 eq.2
adding
using elimination method we get,
2x=168
x=84
put this value of x in eq.2 we get,
84-y=3
y=84-3
y=81
no.=10×84+81
=840+81
=921