Question

The unit of a 2-digit number is 4 more than the 10digit if36is added to that number the digit are reversed find the number

Answer 1

Answer:

let the tun digit number=xy.

A.T.Q.

y=4+x...(1)

10x+y+36=10y+x

-> 10x-x+y-10y+36=0

-> 9x-9y+36=0...(2)

put eq.(1) in (2)

9x-9(4+x)+36=0

9x-36+9x=0

18x=0

x=0

so, y=4.

Hence, number=04