Quantitative Aptitude - Arithmetic Ability Questions

Find the total surface area (in cm2 ) of a hemisphere of diameter 42 cm.

A non-zero number is greater than 7 times its reciprocal by 9.3. What is the number?

Five men or ten women can complete a job in 20 days. In how many days can 3 men and 4 women complete it?

A pipe, working at full speed, can fill an empty cistern in 1 hour. However, during the first hour it worked at one-twelfth of its capacity, during the second hour at one-ninth of its capacity, during the third hour at one-sixth of its usual capacity and during the fifth hour it was only one -third as efficient as it was supposed to be. A second pipe also displayed similar performance, but if it worked at full speed would have filled the empty cistern in 2 hours. Together with a drain pipe that drained water out of the tank at a constant rate, the empty cistern could be filled in 5 hours, all the three pipes working concurrently. How many hours will it take the drain pipe to empty the filled cistern if no other pipe was functioning during the time?

Complete the number series by choosing the missing terms from the options. 32, 64, 256, 1536, ? ,122880,1474560

If 4x + 3y = 11 and 3x + 2y = 8, then (x,y) is

If 3x + 4(1-x) > 5x -2 > 3x - 4; then the value of x is

54% of 4000 is