if the ratio of the ages (in years) of A and B, 5 years ago was 5:7, then which of the following can be the sum of their ages 5 years from now?

if the ratio of the ages (in years) of x and y, 6 years ago was 9:8 then which of the following can be the sum of their ages 6 years from now?

if the ratio of the ages (in years) of x and y, 8 years ago is 7:6, then which of the following can be the sum of their ages 8 years from now?

Seven years ago the ratio of the ages of P and Q (in years) was 7 : 6 . Which of the following cannot be the ratio of their ages 6 years from now ?

Nine years ago A's age and B's age were in the ratio 5 : 7 . Which of the following cannot be the ratio of their ages 5 years from now ?