Question

A 2- digit number has 5 for it's units digit and the sum of digit is 1/5 of the number itself. find number

Answer 1

Answer:

Given the two digit number (10x+y), where y = 5

And also given, x+y = (1/5) (10x+5)

solving for x,

(x+5)5=10x+5

5x+25 = 10x+5

or x=4

the required number is 45.