Simple Ratios — Prelims Questions

The ratio of the present ages of two persons A and B is 4:5. Eight years ago, their ages were in the ratio 3:4. What is the sum of their present ages?

A sum of money is to be distributed among P, Q, and R in the ratio 3:5:7. If R gets Rs. 2400 more than P, what is Q's share?

A mixture contains milk and water in the ratio 7:3. If 20 liters of water are added to the mixture, the ratio of milk to water becomes 7:5. What is the original quantity of milk in the mixture?

The ratio of the number of boys to girls in a school is 5:3. If there are 240 more boys than girls, what is the total number of students in the school?

If A:B = 2:3 and B:C = 4:5, then what is A:B:C?