Quantitative Aptitude - Arithmetic Ability Questions

The compound interest earned in two years at 12% per annum is Rs 10176. What is the sum (in Rs) invested?

The marked price of a sofa set is Rs 4800 which is sold at Rs 3672 at two successive discounts. If the first discount is 10%, then what will be the second discount (in %)?

If x/y = 4/9, then what is the value of (7x2 – 19xy + 11y2)/y2 ?

Reduce 3596 / 4292 to lowest terms.

In an army selection process, the ratio of selected to unselected candidates was 9:2. If 80 less had applied and 20 less selected, the ratio of selected to unselected would have been 5:1. How many candidates had applied for the process?

Pramod can paint a wall red in 12 hours while Brajen can whitewash the wall completely in 16 hrs. If Pramod and Brajen work alternately for an hour each starting when the wall has just cement on it till when it is completely painted red, how many hours will it take to paint the entire wall red?

X and Y started a business investing Rs 12000 and Rs 9000 respectively. After 4 months, X left the business and Z joined the business by investing Rs. 18000. At the end of the year, there was a profit of Rs 12500. What is the share (in Rs) of Z in the profit?

If the radius of a circle is increased by 31% its area increases by ______.