Question

in the two digit the digit in the unit place is twice of the digit in the tenth place if the digits are reversed the new number is 27 more than the given number find the number​

Answer 1

let u=units digit

let t=tens digit

u=2t

..

digits reversed:

10u+t=10t+u+27

20t+t=10t+2t+27

9t=27

t=3

u=2t=6

number:36

Answer 2

Let digit in unit place be x and digit in the tens place be y

:x=2y

(10y+x)-(10x+y)=27