List of top Quantitative Aptitude Questions

A sum of Rs. 18,750 is left by will by a father to be divided between two sons, 12 and 14 years of age, so that when they attain maturity at 18, the amount (principal + interest) received by each at 5 per cent simple interest will be the same. Find the sum allotted at present to each son.

A man borrows Rs. 4,000 at 20\(\%\) compound rate of interest. At the end of each year he pays back Rs. 1,500. How much amount should he pay at the end of the third year to clear all his dues?

One can purchase a flat from a house building society for Rs. 55,000 cash or on the terms that he should pay Rs. 4,275 as cash down payment and the rest in three equal yearly instalments. The society charges interest at the rate of 16\(\%\) per annum compounded half yearly. If the flat is purchased under instalment plan, find the value of each instalment

A farmer sold a cow and an ox for Rs. 800 and got a profit of 20\(\%\) on the cow and 25\(\%\) on the ox. If he sells the cow and the ox for Rs. 820 and gets a profit of 25\(\%\) on the cow and 20\(\%\) on the ox, the individual cost price of the cow and the ox is

\(\%\) of the total number of boys in the group. The number of boys playing only badminton is 50\(\%\) of the number of boys and the total number of boys playing badminton is 60\(\%\) of the total number of boys. The number of children playing only table tennis is 40\(\%\) of the total number of children and a total of 12 children play badminton and table tennis both. What is the number of girls playing only badminton? 

A trader purchases a watch and a wall clock of Rs. 390. He sells them making a profit of 10\(\%\) on the watch and 15\(\%\) on the wall clock. He earns a profit of Rs. 51.50. The difference between the original prices of the wall clock and the watch is equal to

Padam purchased 30 kg of rice at the rate of Rs. 17.50 per kg and another 30 kg rice at a certain rate. He mixed the two and sold the entire quantity at the rate of Rs. 18.60 per kg and made 20\(\%\) overall profit. At what price per kg did he purchase the lot of another 30 kg rice?

Vineet calculates his profit percentage on the selling price whereas Roshan calculates his profit on the cost price. They find that the difference of their profits is Rs. 275. If the selling price of both of them are the same, and Vineet gets 25\(\%\) profit and Roshan gets 15\(\%\) profit, then find their selling price.

A man sells two horses for Rs. 1475. The cost price of the first is equal to the selling price of the second. If the first is sold at 20\(\%\) loss and the second at 25\(\%\) gain, what is his total gain or loss (in rupees)?

In a city, 35\(\%\) of the population is composed of migrants, 20\(\%\) of whom are from rural areas. Of the local population, 48\(\%\) is female while this figure for rural and urban migrants is 30\(\%\) and 40\(\%\) respectively. If the total population of the city is 7,28,400, what is its female population?

A tradesman gives 4\(\%\) discount on the marked price and gives 1 article free for buying every 15 articles and thus gains 35\(\%\). The marked price is above the cost price by

On test tube contains some acid and another test tube contains an equal quantity of water. To prepare a solution, 20 grams of the acid is poured into the second test tube. Then, twothirds of the so-formed solution is poured from the second tube into the first. If the fluid in the first test tube is four times that in the second, what quantity of water was taken initially?

If the digit in the unit’s place of a two-digit number is halved and the digit in the ten’s place is doubled, the number thus obtained is equal to the number obtained by interchanging the digits. Which of the following is definitely true?

Sneh’s age is \(\frac{1}{6}^{th}\) of her father’s age. Sneh’s father’s age will be twice of Vimal’s age after 10 years. If Vimal’s eighth birthday was celebrated two years before, then what is Sneh’s present age?

The arrangement of rational numbers \(\frac{-7}{10},\frac{5}{-8},\frac{2}{-3}\) in ascending order is

when simplified, the product
\(\left\{2-\frac{1}{3}\right\}\)\(\left\{2-\frac{3}{5}\right\}\)\(\left\{2-\frac{5}{7}\right\}\)---\(\left\{2-\frac{999}{1001}\right\}\) is equal to

The value of expression \(\left\{\frac{x^b}{x^c}\right\}^{(b+c-a)}\) \(\left\{\frac{x^b}{x^c}\right\}^{(b+c=a)}\) \(\left\{\frac{x^b}{x^c}\right\}^{(b+c-a)}\) is

How many different ways can 2 students be seated in a row of 4 desks, so that there is always at least one empty desk between the students?

If both 5² and 3³ are factors of n x 2⁵ x 6² x 7³, what is the smallest possible positive value of n?

A clothing supplier stores 800 coats in a warehouse, of which 15 percent are full-length coats. If 500 of the shorter length coats are removed from the warehouse, what percent of the remaining coats is full-length?

In a certain laboratory, chemicals are identified by a colour-coding system. There are 20 different chemicals. Each one is coded with either a single colour or a unique two-colour pair. If the order of colours in the pairs doesn’t matter, what is the minimum number of different colours needed to code all 20 chemicals with either a single colour or a unique pair of colours?

In a rectangular coordinate system, triangle ABC is drawn so that one side of the triangle connects two points on the y axis, A(0, 2) and B(0, -4). If point C has coordinates (c, 0) and the area of ABC is 21, then C =

In the figure below, a circular swimming pool (the unshaded area) is surrounded by a circular walkway (the shaded area). Both the circular swimming pool and the entire circular region consisting of the swimming pool and the walkway have the centre O. If the radius of the swimming pool is 10 meters and the width of the walkway is 5 meters, how much greater than the surface area of the swimming pool is the area of the walkway?

A company received two shipments of ball bearnings. In the first shipment, I percent of the ball bearnings were defective. In the second shipment, which was twice as large as the first, 4.5 percent of the ball bearings were defective. If the company received a total of 100 defective ball bearings, how many ball bearings were in the first shipment?

The speed of a train pulling out of a station is given by the equation s = t2 + t, where s is the speed in kilometers per hour and t is the time in seconds from when the train starts moving. The equation holds for all situations were o t 4. In kilometers per hour, what is the difference in the speed of the train four seconds after it starts moving, compared to the speed two seconds after it starts moving?