Quantitative Aptitude - Arithmetic Ability Questions

If a - b = 4 and ab = -3, then what is the value of a3- b3?

If compound interest received on a certain amount in the 3rd year is Rs. 1,240, what will be the compound interest (in Rs) for the 4th year on the same amount at 9% rate of interest?

A merchant marked cloth at Rs. 50/metre . He offers 2 successive discounts of 15% and 20%. The net price/metre is

What is the area (in sq cm) of a rhombus if the lengths of the diagonals are 12 cm and 14 cm?

Find two numbers such that their mean proportion is 8 and third proportion is 64.

The bus fare between two cities is increased in the ratio 5:11. Find the increase in the fare, if the original fare is Rs. 275.

A boy in a train notices that he can count 31 telephone posts in 60 seconds. the distance between two posts is 60 meters. Calculate the speed of the train?

In a cricket match, the scores of the players are considered such that coefficient of variation of scores is 16 and mean is 25 then the variance is