Mathematical Reasoning — Prelims Questions

A sum of money at simple interest doubles itself in 10 years. In how many years will it triple itself at the same rate?

In a class of 60 students, 35 play cricket, 20 play football, and 10 play both. How many students play neither cricket nor football?

A train 120 meters long is running at a speed of 54 km/hr. How long will it take to cross a pole?

If the price of an article is first increased by 20% and then decreased by 10%, what is the net percentage change in its price?

If A can do a piece of work in 12 days and B can do the same work in 24 days, in how many days will they complete the work if they work together?