Quantitative Aptitude - Arithmetic Ability Questions

What is the difference (in Rs) between the compound interests on Rs. 4000 for 1 year at 12% per annum compounded yearly and half-yearly?

If the edge of a cube is increased by 10%, then what will be the percentage increase in its volume ?

What will be the average of the first 5 positive even numbers divisible by 9?

By what fraction selling price (S.P.) must be multiplied to get the cost price (C.P.) if the loss is 20% ?

The average of 15 numbers is 7. If the average of the first 8 numbers is 6.5 and the average of the last 8 numbers is 8.5 then middle number is

The simple and compound interest that can be earned in two years at the same rate is Rs 4000 and Rs 4180 respectively. What is the rate (percent per annum) of interest?

A book seller allowed 10% discount on printed price. He gets 30% commission from publisher. His profit in percent will be

A merchant marks the price of his articles 30% above the cost price. He gives some discount on it and earns a profit of 13.75%. What is the discount percentage?