List of top Quantitative Aptitude Questions

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?

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?

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?

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 certain game, each player scores either 2 points or 5 points. If n players score 2 points and m players score 5 points, and the total number of points scored is 50, what is the least possible positive difference between n and m?

Which of the following must equal zero for all real numbers x?
(I). x³-x²
(II). x⁰
(III). x¹

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?

If 0 \(<\) p \(<\) I, which of the following has the least value? 

On times	X\(\%\)
Up to 15 minutes delayed	43\(\%\)
15-30 minutes delayed	17\(\%\)
30-60 minutes delayed	12\(\%\)
More than 60 minutes delayed	3\(\%\)

The chart above describes departures from a certain airport on a certain day. If 1,200 flights were delayed, how many flights departed on time?

How many different subsets of the set {10, 14, 17, 24} are there that contain an odd number of elements?

A cube of white chalk is painted red, and then cut parallel to the sides to form two rectangular solids of equal volume. What percent of the surface area of each of the new solids is not painted red?

Gopi constructed a right-angled triangle. By modifying the dimensions of first triangle, he drew another triangle. The modifications are - the largest side is increased by 5 cm, the smallest side is doubled and the third side is increased by 50%. If the triangle formed with these new dimensions has equal angles, then what is the perimeter of the new triangle?

A biased coin with probability p\(;\) 0\(<\)p\(<\)1 of head is tossed until a head appears for the first time. If the probability that the number of tosses required is even is \(\frac{2}{5}\), then p equals to

A club consist of members whose age are in AP. The common difference between the ages is 3 months. If the youngest member is 7 years old and the sum of the ages of all the members is 250, then the number of members in the club is

If a boy can throw a cricket ball 100 m, then the time required for the ball to touch the ground is

In a forest there are as many Santa Trees as there are Ajanta Trees. One-fourth of all the tree are old. One-half of the total trees are in flowering stage. Which of the following statement is true?

If A and B are two mutually exclusive events, then

Three groups A, B and C are contesting for position on the Board of Directors of a company. The probabilities of their winning are 0.5, 0.3 and 0.2 respectively. If the group A wins the probability of introducing a new position is 0.7 and the corresponding probabilities for group B and C are 0.6 and 0.5 respectively. The probability that a new position introduced is

A train whose weight is 16 metric tons, moves at the rate of 72 kmph. After applying brakes it stops in 500 meters. What is the force executed by brakes?

What is 25% of 45% of 4/9th of 4540?

Which number should replace both the question marks in the following equation? \(\frac{?}{492}\)=\(\frac{123}{?}\)

One-seventh of a number is 48. What will 72% of that number be?