Mathematics Questions and Answers for Competitive Exam

When the tax on an article is increased by 20%, its consumption is decreased by 20%. In total tax receipt on this item-

If the price of petrol is reduced by 10%, by how much should a consumer increase the consumption of petrol so that his expenditure on petrol does not decrease?

The number obtained by subtracting two-third of 75% of 600 from a number is 320, what is the original number?

Joseph's income is decreased by 10%, by what percent the new income has to be increased to bring his income back to the previous level?

In a college 12% of all the students are interested in sports, 10% of the total students are interested in singing and three-fourth of the total students are interested in dancing and remaining 15 students are not interested in any activity, How many total students are there in the college?

Two men together start a journey in the same direction. They travel 12 and 20 km/day respectively. After travelling for 8 days the man travelling at 12 km/day doubles his speed and both of them finish the distance in the same time. Find the number of days taken by them to reach the destination.

Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 36 kmph. For how many minutes does the bus stop per hour?

A boat travels 10.8 km upstream in 36 minutes. If the speed of the boat is 21 kmph find how much distance the boat will travel in 28 minutes downstream.

A train covers 450 km in 6 hours. The speed of bike is half of the speed of train. How much time will the bike take to cover the distance of 300 km?

Harish started his journey at 18:40 and finished at 22:20.  The time taken in completing the journey is—