Quantitative Aptitude - MCQ Practice Questions

A worker completes 30% of a job in 6 days. At the same rate, how many more days are needed to complete 80% of the job?

Two pipes A and B fill a tank in 12 and 15 minutes respectively. If both work together and B is closed after 3 minutes, in how many more minutes will the tank be filled?

A boat travels 40 km upstream in 5 hours and 40 km downstream in 2 hours. What is the speed of the boat in still water?

In a mixture of 60 liters, the ratio of milk to water is 3:2. How much water should be added to make the ratio 1:1?

A retailer marks up products by 50% above cost price. During a sale, he offers 30% discount on marked price. What is his profit/loss percentage?

If x% of 480 equals 72, what percentage of 480 is 96?

Ramesh invested ₹15,000 at 9% p.a. simple interest and Suresh invested ₹18,000 at 8% p.a. Who will earn more interest in 3 years and by how much?

A sum becomes ₹9,200 after 4 years at 8% simple interest. What was the original principal?

Two equal sums were invested, one at 10% and another at 12% simple interest for 3 years. If the difference in their amounts is ₹600, find each sum.

Pooja invested some money at 11% simple interest. After 4 years, she received ₹17,600. How much did she invest initially?

A person borrowed ₹25,000 at 9% p.a. simple interest. If he repaid ₹33,250, in how many years did he repay?

₹12,000 is divided into two parts such that the simple interest on first part at 10% for 2 years equals simple interest on second part at 12% for 2 years. Find the first part.

A sum of ₹8,000 is invested at simple interest. If it becomes ₹10,240 in 4 years, what is the rate of interest?

Three friends invested ₹10,000 each at 8%, 10%, and 12% simple interest respectively for 3 years. What is the total interest earned by all three?

A sum of ₹15,000 is invested at 7.5% simple interest p.a. In how much time will it earn an interest of ₹3,750?

Rajesh invested ₹18,000 at simple interest. After 4 years, the amount becomes ₹23,400. If he had invested the same principal for 6 years at the same rate, what would be the total amount?

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?