Quantitative Aptitude - Arithmetic Ability Questions

What is the average of all natural numbers from 21 to 39?

The radius of a sphere and hemisphere are same. The ratio of their total surface area is

To cover a distance of 333 km in 2 hours by a car, what should be the average speed of the car (in meter/second)?

A book is sold at three successive discounts of 20%, 20% and 10%. What is the net discount (in percentage)?

What is the value of 143 + 163 + 183 + ... + 303?

The flight fare between two cities is increased in the ratio 9:11. What is the increase (in Rs) in the fare, if the original fare was Rs. 18,000?

Find out the odd word/letters/number/number pair from the given alternatives.

In the following question, four number pairs are given. The number on left side of (–) is related to the number of 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.