List of top Quantitative Aptitude Questions

The colored roses in the bouquet of flowers are red, yellow, and pink. The ratio of the number of red to the number of yellow to the number of pink in the closet is 7:4:6, respectively. If there are more than 7 yellow colored roses, what is the minimum number of total roses in the bouquet?

A book shop sold a set of Harry Potter books to a book collector for 40 percent more than the store had originally paid for the books. When the collector tried to resell the books to the store, the store bought it back at 50 percent of what the book collector had paid. The shop then sold the book again at a profit of 70 percent on its buy-back price. If the difference between the series of book's original cost to the shop and the book's buy-back price was 100, for approximately how much did the shop sell the books the second time?

Is parallelogram PQRS a rhombus?
(1) \( PQ = QR = RS = SP \)
(2) The line segments SQ and RP are perpendicular bisectors of each other.

There are two vessels. In the first vessel, the ratio of milk to water is 2:3, and in the second vessel the milk and water are in the ratio 3:5. In what ratio the contents in two vessels must be mixed such that the resulting mixture will have milk and water in the ratio 5:8?

A chemical factory produces two kinds of unnatural amino acids: acid A and acid B. Of the acids produced by the factory last year, \( \frac{1}{3} \) were acid A and the rest were acid B. If it takes \( \frac{2}{5} \) as many hours to produce acid B per unit as it does to produce acid A per unit, then the number of hours it took to produce the acid B last year was what fraction of the total number of hours it took to produce all the acids?

A mobile manufacturing company: 6 staff members packed 6 mobiles in 6 minutes. The management wants 60 mobiles packed in 60 minutes. How many staff members are required in total?

Rohan and Rahul are 144 km apart at A and B. Rohan travels at 8 km/hr. Rahul travels 4 km in the first hour, 5 km in the second, 6 km in the third, and so on. Find the point where they meet.

Find the unit's place digit of \((1!)^{1! + (2!)^{2!} + (3!)^{3!} + \cdots + (100!)^{100!}\).}

Amar consumed 100 laddoos from Monday to Friday. Each day he consumed 6 more laddoos than the previous day. How many laddoos did he consume on Wednesday?

In how many ways can 10 books on Mechanics and 8 books on Quantum Physics be placed in a row such that two Quantum Physics books are not together?

In an institute, an MBA exam has 4 sections and a sectional cutoff is applied. A candidate qualifies only if they clear \emph{every sectional cutoff. In how many ways may an applicant fail the exam?}

In how many ways can the letters of the word POTICA be arranged such that the vowels occupy odd positions?

A square, circle, regular hexagon and regular octagon all have the same perimeter \(P\). Which one has the maximum area?

The difference between CI and SI for a loan is \rupee114 when invested for 2 years at the rate of 6\% per annum. Find the loan amount.

What is the coefficient of $z^{3$ in $-7x y^{2} z^{3} a^{2} b^{2}$?}

In a closed wooden box, length $=20$ cm, breadth $=14$ cm, height $=10$ cm and thickness $=5$ mm. If weight of empty box is $3.462$ kg, what is the weight of $1\text{ cm^3$ of wood?}

Find the number of zeros at the end of $(5!)^{5!}+(10!)^{10!}+(50!)^{50!}+(100!)^{100!}$.

Ritesh is twice as good as Mitesh. Ritesh takes 30 days less than Mitesh to finish a task. How long will they take to complete the task together?

A $200$-litre container initially has $x$ litres of milk (only milk). $6$ L of milk is removed and $5$ L water is added. Then $6$ L of the mixture is replaced with $6$ L water. Finally, milk and water are in the ratio $9:16$. Find $x$.

A train runs at $60$ km/h but halts for a fixed time every clock hour. Due to halts, its average speed becomes $50$ km/h. Find the duration of each halt.

Valve A fills a bathtub in 10 hours and valve B fills it in 15 hours. A and B are opened together; later B is closed. The tub is filled in 8 hours in total. For how long was B open?

Average stipend of a group is \rupee50 per day. The difference between maximum and minimum stipend is \rupee45. If both these students are excluded, the average decreases by \rupee1. The minimum earning of any student lies between \rupee42 and \rupee47, and the number of students is a prime number whose both digits are also prime. Find the initial number of students.

Robot A, B and C make \(25\%\), \(35\%\) and \(40\%\) of circuit boards, with defect rates \(5\%\), \(4\%\) and \(2\%\) respectively. If one board is picked at random, what is the probability it is defective?