List of top Quantitative Aptitude Questions

The Standard Deviation of 2, 4, 6, 8, 10 is
If $(a + b\sqrt{3})^2 = 52 + 30\sqrt{3}$, where $a$ and $b$ are natural numbers, then $a + b$ equals ?
The average age of 5 children is 8 years. If the age of the father is included to the children average becomes 13, then the age of the father is
A, B and C are three partners. They all together invested Rs 42,000 in a business. At the end of the year, A received Rs 377.50, B Rs 1085 and C Rs 637.50 as profit. The difference between the investments of B and C is:
If \( \frac{a}{c} = \frac{c}{d} = \frac{e}{f} \), then
The greatest number of 5 digits which when divided by 4, 5, 6, 7, and 8 leaves 1, 2, 3, 4, and 5, respectively, as remainders is:
A function f maps the set of natural numbers to whole numbers, such that f(xy) = f(x)f(y) + f(x) + f(y) for all x, y and f(p) = 1 for every prime number p. Then, the value of f(160000) is
If \( y = \tan^{-1}(x) \), then \( \frac{dy}{dx} = \)
If each exterior angle of a regular polygon is \( 36^\circ \), then the number of sides of the polygon is
A bag contains 3 red balls, 4 white balls, and 7 black balls. The probability of drawing a red or a black ball is
The father is 7 times older than his son. After 5 years the sum of their ages would be 50 years. The son’s age at present is
If \[ \frac{28.5}{5} \, \frac{21.5}{15} = \frac{15.5}{30} = \left( \frac{x}{4} \right)^3 - 3, \] then the value of \(x\) is:
If the 5th term of \( \left( 2x^2 + \frac{3}{x} \right)^5 \) is 10, then \( x = \)
Evaluate the following expression: \[ \frac{0.963 \times 0.963 - 0.963 \times 0.037 + 0.037 \times 0.037}{0.963 \times 0.963 \times 0.963 + 0.037 \times 0.037 \times 0.037} \]
Evaluate the limit: \[ \lim_{x \to 2} \left[ \frac{1}{x - 2} - \frac{1}{x^2 - 3x + 2} \right]. \]
If \( A \) is a non-singular 3x3 matrix, then \( \left| 5A \right| \) is
Find the correct number that will complete the series: 14, 26, 36, 44, 50, ________, 56
By selling an item at a discount of 20%, the profit is 20%. The profit percentage, if the item is sold at a discount of 10%, is:
Two trains arrived at a station at 10:45 am and 11:50 am with a late of 25 minutes and 30 minutes respectively. What is the time difference, in minutes, between their scheduled arrivals at the station?
Cynthia has borrowed Rs. 6,000 at the rate of 7% S.I. What amount does she need to pay after 3 years to clear the debt?
Anish and Bala can do a work in 8 days, Bala and Cynthia can do the same work in 12 days. Anish, Bala, and Cynthia together can finish it in 6 days. How many days will Anish and Cynthia together do it?
The average age of 6 sons of a family is 8 years. The average age of the sons together with their parents is 22 years. If the father is 8 years older than the mother, then the age of the father (in years) is:
After allowing a discount of 12% on the marked price, a shopkeeper still gains 21%. How much (in percentage) is the marked price above the cost price?
Calculate the value of the following expression: \[ \frac{(0.12562 \times 0.3179)}{(0.9537) \times (0.25124)}. \]
Anil invests Rs 22000 for 6 years in a scheme with 4% interest per annum, compounded half-yearly. Separately, Sunil invests a certain amount in the same scheme for 5 years, and then reinvests the entire amount he receives at the end of 5 years, for one year at 10% simple interest. If the amounts received by both at the end of 6 years are equal, then the initial investment, in rupees, made by Sunil is