Quantitative Aptitude - Arithmetic Ability Questions

The marked price of an article is Rs. 5000. But due to a special festive offer a certain percent of discount is declared. Mr. X availed this oppurtunity and bought the article at reduced price. He then sold it at Rs. 5000 and thereby made a profit of 11 1/9%. The percentage of discount allowed was?

If x + (1/x) = 2, then what is the value of x21 + (1/x1331)?

An army of 12000 consists of Europeans and Indians. The average height of a European is 5ft 10 inches and that of an Indian is 5ft 9 inches and that of the whole army is 5ft 9 3/4 inches. Then the number of Indians in the army is ?

A car travelling at an average speed of 72 km/hr takes 9 minutes to travel a certain distance. By how much should it increase its speed (in km/hr) to travel the same distance in 8 minutes?

Mr. Rajesh buys a toy for Rs. 27.50 and sells it for Rs. 28.60. Find the gain %.

The marked price of a trouser is twice of the cost price. To earn 36% profit, what should be the value of discount (in percentage)?

Which of the fractions given below, when added to 5/8, gives 1?

What is the sum of a3+b3+c3-3abc, when the value of a=4, b=2 and c=-6?