Quantitative Aptitude - Arithmetic Ability Questions

What will be the net discount percentage of three successive discounts of 20%, 10% and 30%?

Choose the word is least like the other words in the group

If x2+ x = 19, then what is the value of (x + 5)2+ [1/(x + 5)2]?

If the radius of a circle is increased by 16%, its area increases by

What is the average of all numbers between 11 and 80 which are divisible by 6?

A bus travels 720 km in 20 hours. Calculate its average speed in meters/second.

Manish is four times as efficient as Puneet. Manish takes 90 days less than Puneet to complete a book. If both of them work together, then in how many days the book will be completed?

The sum of the ages of husband and wife at present is 56. Ten years ago the product of their ages was 320. What is the age of the husband and the wife?