Question

the digits of a two-digit number differ by 3. if the digit are interchanged and the resulting number is added to the original number, we get 143. what can be the original number?

Answer 1

Answer:

85

Step-by-step explanation:

let unit digit be x and tens be y then y-x=3....(i)

atq

10x+y+10y+x=143=11{x+y}=143=x+y=13...(ii)

from i and ii

y=3+x;x+3+x=13=2x=10=x=5

as unit digit=5;y=3+5=8

*hence no. is 85