List of top Quantitative Aptitude Questions

The system of equations is: \[ 7x + 3y = 12 \\ 3x + 7y = 6 \] If \(x\) and \(y\) satisfy the system of equations, what is the value of \(x - y\)?

The total amount of Judy’s water bill for the last quarter of the year was \(\$ 40.50\). The bill consisted of a fixed charge of \(\$ 13.50\) plus a charge of \(\$ 0.0075\) per gallon for the water used in the quarter. For how many gallons of water was Judy charged for the quarter?

A polygon has 20 diagonals. How many sides does it have?
How many pentagons can be drawn by joining the vertices of a polygon with 10 sides?
Find the number of words formed by permuting all the letters of the word INDEPENDENCE such that the E’s do not come together.
Ten different letters of an alphabet are given. Words with 6 letters are formed with these alphabets. How many such words can be formed when repetition is not allowed in any word?
If \(P(2n+1,n-1):P(2n-1,n) = 3:5\), find \(n\).
A box contains 5 red and 4 blue balls. In how many ways can 4 balls be chosen such that there are at most 3 balls of each colour?
In how many ways can five rings be worn in 3 fingers?
There are 12 children in a party. For a game they have to be paired up. How many different pairs can be made for the game?
How many different differences can be obtained by taking only 2 numbers at a time from 3, 5, 2, 10 and 15?
In a class test there are 5 questions. One question has been taken from each of the 4 chapters. The first two chapters have 3 questions each and the last two chapters have 6 questions each. The fifth question can be picked from any of the chapters. How many different question papers could have been prepared?
How many five-digit numbers can be formed using the digits 0, 2, 3, 4 and 5, when repetition is allowed, such that the number formed is divisible by 2 and 5?
How many three-digit odd numbers can be formed from the digits 1, 3, 5, 0 and 8?
Six points lie on a circle. How many quadrilaterals can be drawn joining these points?
There are 3 children of a lady. In how many ways is it possible to dress them for a party if the first child likes 3 dresses, the second likes 4, and the third likes 5 but has outgrown one of them? Each child has a different set of clothes.
Find the number of words formed by permuting all the letters of the word INDEPENDENCE.
A straight road runs from north to south. It has two turnings towards east and three turnings towards west. In how many ways can a person coming from east get on the road and go west?
A polygon has 20 diagonals. How many sides does it have?
Four persons enter the lift of a seven-storey building at the ground floor. In how many ways can they get out of the lift on any floor other than the ground floor?
How many heptagons can be drawn by joining the vertices of a polygon with 10 sides?
Ten different letters of an alphabet are given. 2 of these letters followed by 2 digits are used to number the products of a company. In how many ways can the products be numbered?
If \(P(2n+1,n-1):P(2n-1,n) = 3:5\), find \(n\).
A box contains 5 red and 4 blue balls. In how many ways can 4 balls be chosen such that there are at most 3 balls of each colour?
How many five-digit numbers can be formed using the digits 0, 2, 3, 4 and 5, when repetition is allowed, such that the number formed is divisible by 2 or 5 or both?