Tag: math & puzzles

A person has 4 coins each of different denomination. What is the number of different sums of money the person can form (using one or more coins at a time)?

The simple interest on a certain sum of money for 3 years is 225 and the compound interest on the same sum at the same rate for 2 years is 153 then the principal invested is

A cow is tethered in the middle of a field with a 14 feet long rope. If the cow grazes 100 sq. ft. per day, then approximately what time will be taken by the cow to graze the whole field ?

2 hours after a freight train leaves Delhi a passenger train leaves the same station travelling in the same direction at an average speed of 16 km/hr. After travelling 4 hrs the passenger train overtakes the freight train. The average speed of the freight train was?

8 15 24 35 48 63 ?

2 numbers differ by 5.If their product is 336,then the sum of the 2 numbers is:

A radio when sold at a certain price gives a gain of 20%. What will be the gain percent, if sold for thrice the price?

Thirty men take 20 days to complete a job working 9 hours a day. How many hour a day should 40 men work to complete the job?