Quantitative Aptitude - Arithmetic Ability Questions

When a discount of 25% is given on a box of popcorn, the profit is 25%. If the discount is 10%, then the profit is

A shopkeeper by selling 21 Nike shoes, earns a profit equal to the selling price of 5 Nike shoes. His profit percentage is

The third proportional of two numbers 4 and 28 is _______.

The marked price of an article is Rs 960 and it is sold at a discount of Rs 192. What is the discount percentage?

The compound interest earned in two years at 8% per annum is Rs 4160. What is the sum (in Rs) invested?

Of the 5 numbers whose average is 76, the first is 3/7 times the sum of other 4. The first number is

D and E are points on the sides AB and AC respectively of ΔABC such that DE is parallel to BC and AD:DB = 4:5, CD and BE intersect each other at F. Then the ratio of the areas of ΔDEF and ΔCBF