List of top Quantitative Aptitude Questions

The numbers $1, 2, \dots, n$ are written in natural order. Numbers in odd places are struck off to form a new sequence. This process is continued until only one number is left. If $n = 1997$, find the last remaining number.
For an odd positive integer $n$ ($51 \le n \le 99$), the quantity $n^3 - n$ is always divisible by:
The area of a rectangle is 48 cm$^2$, and its perimeter is 28 cm. What is the length of the rectangle?
If the area of a circle is $154$ cm$^2$, what is its circumference?
A man has Rs. 2000 in Rs. 10 and Rs. 20 notes. He has 150 notes in total. How many Rs. 10 notes does he have?
Farmer has hens and goats. Total heads = 80, total feet = 200. Find number of goats.
Difference between SI and CI (compounded annually) on Rs. 2000 for 2 years at 8% per annum.
A starts business with Rs. 5000. B joins 5 months later with Rs. 6000. After a year, profit = Rs. 34,000. Find A’s and B’s shares.
Square field has area = \( 324 \ \text{m}^2 \). Find perimeter.
A closed metal box measures \( 30 \ \text{cm} \times 20 \ \text{cm} \times 10 \ \text{cm} \). Thickness of the metal is 1 cm. Find the volume of metal required to make the box.
Dealer marks goods 20% above cost and gives 10% discount. Find gain percent.
If 80% of A = 20% of B and B = 5% of A, find value of x.
Employer reduces employees in ratio 8:5 and increases wages in ratio 7:9. Find change in total wage bill.
‘A’ can do a piece of work in 20 days and ‘B’ can do it in 15 days. How long will they take to finish together?
Father is 3 yr older than mother, and mother’s age is twice daughter’s age. Daughter is 20 now. Find father’s age when daughter was born.
A mixture of 40 L of alcohol and water contains 10% water. How much water should be added to this mixture so that the new mixture contains 20% water?
A person covers a certain distance at 30 km/h and returns at 40 km/h. Average speed = ?
A man rows 5 km/h in still water. Current speed = 1 km/h. It takes 3 h more upstream than downstream for same distance. Find the distance.
A person spends \( \frac{1}{3} \) of his income on food, \( \frac{1}{4} \) on house rent, and the remaining Rs. 630 on other items. The house rent is:
There are 30 boys and 40 girls in a class. Average age of boys = 10 years, average age of girls = 8 years. Find the average age of the whole class.
Probability of corpse being the missing man given independent events:
- Gold-plated tooth: 1 in 5000
- Left hand thumb fracture: 1 in 20000
- Right ear pierced: 1 in 100
The Least Common Multiple (LCM) of 0.12, 9.60, and 0.60 is:
Find the value of \(A\) in: \[ 5 + 12 \times 10 \times \frac{120}{240} = A \times 10 \]
The next number in the sequence is: 19, 29, 37, 43, …
Rohan and Sohan start from the same point on a circular track in the same direction. Speed of Rohan is nine times Sohan. How many times are they diametrically opposite by the time Sohan completes 3 rounds?