List of top Quantitative Aptitude Questions

Find out the appropriate next number in the series from the options below: 0, 2, 6, 12, 20, 30, 42, ?
A bakery opened with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon, and 60% of the remaining rolls were sold between noon and closing time. How many dozen rolls were left unsold?
Stuart, Jack and Leo are colleagues working in a plant. Stuart and Jack can do a work in 10 days, Jack and Leo can do the same work in 15 days while Stuart and Leo can do it in 12 days. All of them started the work together. After two days, Leo was shifted to some other work. How many days will Stuart and Jack take to finish the rest of the work?
Two different prime numbers X and Y, both are greater than 2, then which of the following must be true?
It takes 6 hours for pump A, used alone, to fill a tank of water. Pump B used alone takes 8 hours to fill the same tank. A, B and another pump C all together fill the tank in 2 hours. How long would pump C take, used alone, to fill the tank?
A swimming pool can be filled by pipe A in 3 hours and by pipe B in 6 hours, each pump working on its own. At 9 am, pump A is started. At what time will the swimming pool be filled if pump B is started at 10 am?
In an examination, the average marks obtained by students who passed was \( x\% \), while the average of those who failed was \( y\% \). The average marks of all students taking the exam was \( z\% \). Find in terms of \( x, y, z \), the percentage of students taking the exam who failed.

Let \( f \) be an injective map with domain x, y, z and range 1, 2, 3 such that exactly one of the following statements is correct and the remaining are false.} 
[I.] \( f(x) = 1 \Rightarrow f(y) = 1, f(z) = 2 \) 
[II.] \( f(x) = 2 \Rightarrow f(y) = 1, f(z) = 1 \) 
[III.] \( f(x) = 1, f(y) = 1, f(z) = 2 \) Then the value of \( f(1) \) is:

Consider the following statements: When two straight lines intersect, then:
[I.] Adjacent angles are complementary
[II.] Adjacent angles are supplementary
[III.] Opposite angles are equal
[IV.] Opposite angles are supplementary Which of these statements are correct?

For what value of \( k \) does the following pair of equations yield a unique solution for \( x \), such that the solution is positive?

\(x^2 - 3y^2 = 0 \)
\(x^2 - 6y^2 + k = 0 \)

2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, ?
100, 50, 33.33, .............., 20
Find 12% of 5000:
OABC is a square where O is the origin and AB = 1. Consider the set of points S = (xi, yi) in the square such that xi + yi ≤ 1.

Let P(x1, y1) and Q(x2, y2) be two such points. Two operations addition (+) and multiplication (·) on S are defined as:

P + Q = (x1 + x2 − x1x2, y1y2)

P · Q = (x1x2,   y1 + y2 − y1y2)
Let A1, A2, …, An be the points on the straight line y = px + q. The coordinates of Ak is (Xk, Yk), where k = 1, 2, …, n such that X1, X2, …, Xn are in arithmetic progression. The coordinates of A2 is (2, −2) and A24 is (68, 31).
88, 96, 104, ?
3, 9, .............., 6561
Four gardeners with four grass mowers mow 400 square meters of ground in four hours. How long would it take for eight gardeners with eight grass mowers to mow 800 square meters of ground?
Square root of 400 is:
Y travels 15 kilometers due South, then 5 km due West, then 18 km due North, then 3 km due South, then 5 km due East. How far is he from the starting point?
Which of the following fractions has the highest value: \( \frac{3}{5}, \frac{4}{3}, \frac{2}{5}, \frac{1}{2} \)
\( 6 \times 3 \, (3 - 1) \) is equal to:
If the numbers from 1 to 24, which are divisible by 2, are arranged in descending order, which number will be at the 8th place from the bottom?
What is the place (location) value of 5 in 3254710?
Average age of ten persons learning yoga is 32 years. When the age of their instructor is added, the average age becomes 34 years. The age of their instructor is: