Quantitative Aptitude - MCQ Practice Questions

The average score of 5 students in Mathematics is 78. If one student who scored 68 leaves and a new student joins with score 88, what is the new average?

A shopkeeper sells 3 items at ₹200 each with 20% profit, 2 items at ₹300 each with 25% loss. What is his average profit/loss percentage?

Two pipes A and B fill a tank in 12 hours and 15 hours respectively. If both work together and pipe C drains it in 20 hours, how long to fill the tank?

The average of 4 numbers is 35. If three numbers are 28, 36, and 42, what is the fourth number?

A train travels 200 km in 4 hours and then 150 km in 2.5 hours. What is its average speed?

A boat covers 45 km downstream in 3 hours and 35 km upstream in 5 hours. What is the average speed of the boat in still water?

The average age of 6 people increases by 2 years when one person aged 40 is replaced. What is the age of the new person?

A person invests ₹8,000 at 10% SI for 3 years and ₹6,000 at 12% SI for 2 years. What is the average rate of return on total investment?

Two workers can complete a job in 8 days and 12 days respectively. If they work together, in how many days will the job be completed?

A trader buys 100 items at an average cost of ₹50 each. He sells 60 items at 20% profit and 40 items at 10% loss. What is his overall profit/loss percentage?

The average height of 5 students is 165 cm. If a 6th student of height 180 cm joins, what is the new average height?

A train covers $\frac{1}{3}$ of its journey at 40 km/h, $\frac{1}{3}$ at 50 km/h, and $\frac{1}{3}$ at 60 km/h. What is the average speed?

The average of 8 consecutive even numbers is 15. Which is the smallest number?

A vessel contains milk and water in ratio 3:2. If 10 liters of mixture is removed and 10 liters of milk is added, the ratio becomes 4:1. What was the original quantity of milk?

The average monthly income of 4 employees is ₹45,000. If a 5th employee with income ₹55,000 joins, what is the new average?

A boat's speed in still water is 15 km/h. It takes 4 hours upstream and 2 hours downstream to cover the same distance. What is the speed of the current?

The average of 5 numbers is 48. If 4 numbers are 40, 45, 50, 55, what is the 5th number?

A compound interest is earned on ₹10,000 at 8% per annum for 2 years. What is the average annual interest?

The profit on 50 units is ₹2,500. What is the average profit per unit if 200 units are sold?

The average of 6 numbers is 42. If three numbers are 35, 40, and 45, what is the average of the remaining three numbers?