Quantitative Aptitude - Arithmetic Ability Questions

Two fractions are such that their product is ­9/10 and sum is ­13/40. What are the two fractions.

Pipes A, B and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hrs, respectively, the third can drain the cistern, when filled, in 6 hrs. If all the three pipes are opened simultaneously when the cistern is half-full, how many hours will be needed to fill the cistern?

The simple interest on a sum is 7/8 of the principal for 5 years. What is the rate (in percentage) of interest per annum?

Find the value of '?, if the mean of the data set 18, 16, 22, 13, ? = 16.

What is the equation of the line if its slope is 1/4 and y-­intercept is ­-3?

Find the average of all prime numbers from 1 to 50.

What is the circumference (in cm) of a circle whose area is 616 sq cm?

Choose the correct option for the figure shown below.