Mathematics Past Questions and Answers

The average of three numbers is 49. If the difference between the largest and the smallest number is 31 and the addition of these two numbers is 99, what is the middle number?

The ratio of the ages of two sisters today is 1 : 2. However, after 4 years, the ratio would be 2:3. What is the age of the eldest sister today?

Ade alone can complete a job in 12 days. Bayo alone can complete the same job in 18 days. If both of them work together, in how many days would the job be completed?

Two persons A and B working together can dig a trench in 10 hours while A alone can dig it in 14 hrs. In how many hours B alone can dig such a trench?

A mixture contains alcohol and water in the ratio 2:1. If 3 litres of water is added to the mixture, the ratio becomes 2:3. Find the 2 quantity of alcohol in the given mixture.