Quantitative Aptitude - Arithmetic Ability Questions

If a - b = 1 and ab = 6, then what is the value of a3- b3?

If the side of a square is increased by 20%, then what will be the percentage increase in its perimeter?

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

What should be the average speed of the car to cover a distance of 342 km in 1.9 hours?

Mohan earns a profit of 20% on selling a jean at 15% discount on printed price. The ratio of the cost price to printed price of the jean is

If sec -7π/4 = x, then the value of x is

In the following question, select the odd number group from the given alternatives.

If a + b = 4 and ab = -5, then what is the value of a3 + b3?