Question

One year ago, the ration of Anuj's and Brijesh's age was 5:6 respectively. Four years hence, this ration would become 6:7. How old is Brijesh?

Answer 1

Let the common factor be x
Then one year ago, Age of Anju is 5x and Brijesh is 6x
Four year hence their age will be 5x+5 and 6x+5 respectively
ATQ                     (5x+5)/(6x+5)=6/7
                         ⇒ 35x + 35= 36x +30
                         ⇒ x=5
Then Brijesh is 6*5+1= 31 years old