Quantitative Aptitude - Arithmetic Ability Questions

If 10% loss is made on selling price, then the rate of loss on the cost price will be

A man travels 50 km at speed 25 km/h and next 40 km at 20 km/h and there after travel 90km at 15 km/h. His average speed is

On decreasing the price of a fan by 40%, its sales increases by 50%. What will be the percentage increase or decrease in its revenue?

x and y are two numbers such that their mean proportion is 16 and third proportion is 128. What is the value of x and y?

If the radius of a circle is increased by 21%, then its area will increase by what percent?

The least number that must be subtracted from 1294 so that the remainder when divided by 9, 11, 13 will leave in each case the same remainder 6 is:

In how many months will Rs 8,000 yield Rs 2,648 as compound interest at 20% per annum compounded semi-annually?

In a class, there were 9 boys and some girls. In a test the mean score obtained by the boys was 12 while that obtained by the girls was 14. If the overall average was 13.1, what was the total number of students in the calss?