Question

pls tell solution of question 41

Answer 1

let the number be xy.
so it is of the form 10x+y.
now x=2y
and,10y+x=(10x+y)-27
by putting x=2y,we get
10y+2y = 10×2y+y-27
12y = 21y-27
9y = 27
y =3
so the number is63