Quantitative Aptitude - Arithmetic Ability Questions

Suppose n is a positive integer such that (n2+ 48) is a perfect square. What is the number of such n?

If m ­ n = 2 , mn = 15 , (m , n > 0) then the value of m2-n2m3-n3

Mohit buys an old bicycle for Rs 2700 and spends Rs 500 on its repairs. If he sells the bicycle for Rs 3520, then what is his profit percentage?

By selling cloth at Rs. 9 per metre , a shopkeeper loses 10% . Find the rate at which it should be sold so as to earn profit of 15%

To cover a distance of 216 km in 3.2 hours, what should be the average speed of the car in meters/second?

The price of a product after getting 20% discount is Rs 3,024 which includes 5% tax on selling price. What was the marked price (in Rs) of the product?

Travelling at 4/5th of his usual speed, a man is 15 minutes late. What is his usual time to cover the same distance?

2/3 of a milk-water mixture was milk. There was 21 lit of the mixture. If 4 lit of water is added to it, the % of milk in the new mixture will be: