List of top Quantitative Aptitude Questions

80% of students of a class took Statistics and 45% took Mathematics. If each student took Statistics or Mathematics and 40 took both, the total number of students in the class was:
A tank is connected to three pipes - Pipe A, B and C. Pipe A can fill the tank in 6 hours, B can fill the tank in 8 hours and Pipe C can empty the full tank in 12 hours. How much time will it take to fill the tank completely if all three pipes are working together?
A car driver increases the average speed of his car by 3 km/hr every hour. The total distance travelled in 7 hours if the distance covered in first hour was 30 km, is
Kiran's brother is 5 years older to her. Her father was 30 years old when Kiran's sister was born, while her mother was 28 years old when Kiran was born. If Kiran's sister was 2 years old when her brother was born, what was the age of their father when Kiran's brother was born?
The smallest number that should be subtracted from 2085, so that the new number is completely divisible by 23 is
If Second Saturday and Sunday of every month is a holiday, then the total number of working days in a month of 31 days beginning with a Wednesday will be
The difference between Simple Interest and Compound Interest on Rs. 500 for 1 year at 10% per annum, reckoned half yearly is
A worker carries jugs of liquid soap from a production line to a packing area, carrying 4 jugs per trip. If the jugs are packed into cartons that hold 7 jugs each, how many jugs are needed to fill the last partially filled carton after the worker has made 17 trips?
During a certain time period, Car X traveled north along a straight road at a constant rate of 1 mile per minute and used fuel at a constant rate of 5 gallons every 2 hours. During this time period, if Car X used exactly 3.75 gallons of fuel, how many miles did Car X travel?
Judy bought a quantity of pens in packages of 5 for 0.80 per package. She sold all of the pens in packages of 3 for 0.60 per package. If Judy's profit from the pens was $8.00, how many pens did she buy and sell?
On a certain day, a bakery produced a batch of rolls at a total production cost of $300. On that day, (4/5) of the rolls in the batch were sold, each at a price that was 50% greater than the average (arithmetic mean) production cost per roll. The remaining rolls in the batch were sold the next day, each at a price that was 20% less than the price of the day before. What was the bakery's profit on this batch of rolls?
Company Q plans to make a new product next year and sell each unit of this new product at a selling price of 2. The variable costs per unit in each production run are estimated to be 40% of the selling price, and the fixed costs for each production run are estimated to be $5,040. Based on these estimated costs, how many units of the new product will Company Q need to make and sell in order for their revenue to equal their total costs for each production run?
A certain financial institution reported that its assets totaled 2,377,366.30 on a certain day. Of this amount, 31,724.54 was held in cash. Approximately what percent of the reported assets was held in cash on that day?
An equilateral triangle that has an area of \( 9\sqrt{3} \) is inscribed in a circle. What is the area of the circle? [Official GMAT-2018]
As shown in the diagram above, a lever resting on a fulcrum has weights of \( w_1 \) pounds and \( w_2 \) pounds, located \( d_1 \) feet and \( d_2 \) feet from the fulcrum. The lever is balanced and \( w_1d_1 = w_2d_2 \). Suppose \( w_1 \) is 50 pounds and \( w_2 \) is 30 pounds. If \( d_1 \) is 4 feet less than \( d_2 \), what is \( d_2 \), in feet? [Official GMAT-2018]
In a numerical table with 10 rows and 10 columns, each entry is either a 9 or a 10. If the number of 9s in the nth row is \( n - 1 \) for each \( n \) from 1 to 10, what is the average (arithmetic mean) of all the numbers in the table? [Official GMAT-2018]
A manufacturer makes and sells 2 products, P and Q. The revenue from the sale of each unit of P is 20.00 and the revenue from the sale of each unit of Q is 17.00. Last year the manufacturer sold twice as many units of Q as P. What was the manufacturer's average (arithmetic mean) revenue per unit sold of these 2 products last year? [Official GMAT-2018]
The sum of the weekly salaries of 5 employees is $3,250. If each of the 5 salaries is to increase by 10 percent, then the average (arithmetic mean) weekly salary per employee will increase by [Official GMAT-2018]
For each student in a certain class, a teacher adjusted the student's test score using the formula \( y = 0.8x + 20 \), where \( x \) is the student's original test score and \( y \) is the student's adjusted test score. If the standard deviation of the original test scores of the students in the class was 20, what was the standard deviation of the adjusted test scores of the students in the class? [Official GMAT-2018]
How many integers between 1 and 16, inclusive, have exactly 3 different positive integer factors? (Note: 6 is NOT such an integer because 6 has 4 different positive integer factors: 1, 2, 3, and 6.) [Official GMAT-2018]
If \( m \) and \( p \) are positive integers and \( m^2 + p^2<100 \), what is the greatest possible value of \( mp \)?
According to the table shown, the estimated number of home-schooled students in State A is approximately what percent greater than the number in State D?
In a certain medical survey, 45 percent of the people surveyed had the type A antigen in their blood and 3 percent had both the type A antigen and the type B antigen. Which of the following is closest to the percent of those with the type A antigen who also had the type B antigen? [Official GMAT-2018]
Cheryl purchased 5 identical hollow pine doors and 6 identical solid oak doors for the house she is building. The regular price of each solid oak door was twice the regular price of each hollow pine door. However, Cheryl was given a discount of 25% off the regular price of each solid oak door. If the regular price of each hollow pine door was $40, what was the total price of all 11 doors? [Official GMAT-2018]
The table shows the amount budgeted and the amount spent for each of three accounts in a certain company. For which of these accounts did the amount spent differ from the amount budgeted by more than 6 percent of the amount budgeted? [Official GMAT-2018]