Quantitative Aptitude - MCQ Practice Questions

The average weight of A, B, and C is 70 kg. If A's weight is 75 kg and B's weight is 68 kg, what is C's weight?

A boat travels 50 km upstream in 5 hours and 80 km downstream in 4 hours. What is the average speed of the boat in still water?

The average of first n natural numbers is 10.5. What is the value of n?

A worker completes $\frac{1}{4}$ of a job in 5 days. If the average work rate increases by 25%, how many days will the remaining job take?

Two pipes A and B fill a tank in 12 hours and 15 hours respectively. If both work together, what is the average time to fill the tank?

A merchant bought goods for ₹10,000. He sold them at 20% profit. What is the average cost if he later bought more goods for ₹15,000 at a 10% loss?

The average of 7 consecutive odd numbers is 39. What is the largest number?

A train covers 25% of its journey in 2 hours at 50 km/h. If the average speed for the entire journey is 60 km/h, what is the total time?

A person invests ₹5,000 at 8% SI and ₹7,500 at 12% SI for 2 years. What is the average interest rate on total investment?

The average age of a group increases by 2 years when a person of age 28 is replaced by a person of age 38. What is the size of the group?

Three containers have milk with average concentration 40%, 50%, and 60%. If equal quantities are mixed, what is the average concentration?

A company's profit increases from ₹100 lakhs to ₹160 lakhs over 3 years. What is the average percentage increase per year (approx)?

A batsman's average runs increase from 40 to 45 when he scores 65 in his next innings. How many innings had he played before?

Two vessels contain water-sugar mixture in ratio 3:1 and 5:2. Equal quantities are mixed. What is the average percentage of water in the final mixture?

A cyclist travels 40 km at 20 km/h, then 60 km at 30 km/h, and finally 100 km at 50 km/h. What is his average speed for the entire journey?

The average weight of boys in a class is 60 kg and of girls is 55 kg. If boys and girls are in ratio 3:2, what is the average weight of the entire class?

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?