Question

Mr. X is twice as old as Mr. Y. Three years
ago X was three times as old as Y. The present age of Y is :​

Answer 1

let Mr. X age be a

let Mr. Y age be b

then,

X=2Y .......(1)

3 years ago,

X-3=3(Y-3) .......(2)

Now, compare (1)and (2)

X-(X-3)=2Y-3(Y-3)

3=9-Y

Y=6