Quantitative Aptitude - Arithmetic Ability Questions

On selling 56 chairs, Mohan earns profit equal to the selling price of 6 chairs. What is the profit percentage?

The average age of 40 students of a class is 16 years. If the average age of 24 students is 15.5 years and that of the 15 students is 16 2⁄3 years, then the age of 40th student is

A boy buys 5 pencils at Rs 3 each, 3 erasers at Rs 2 each and 3 sharpeners at Rs 5 each. What is the average expenditure (in Rs) per article?

If 7x ­- 5y = 13 and 2x -­ y = 5, then (x -­ y) is

Find the value of x if 1-x24 = 1318

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

What is the simplified value of 12-13 ?

The maturity value of a certain sum after two years at 20% p.a. interest compounded annually is Rs. 14,400/-. Find the Principal amount.