Quantitative Aptitude - Arithmetic Ability Questions

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?

After two successive discounts of 20% and 35%, an article is sold for Rs 50700. What is the marked price (in Rs) of the article?

If 13A = 11B = 8C, find A : B : C

If P : Q : R = 2 : 3 : 5, then what is the value of (P + Q) : (Q + R) : (R + P)?

If 10 people can do a job in 20 days,then 20 people with twice the efficiency can do the same job in

On a certain principal if the Simple interest for two years is Rs 3000 and Compound interest for the two years is Rs 3225, what is the rate of Interest?

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)?