A family consists of two grandparents, two parents and three grandchildren. The average age of the grandparents is 67 ye…

Total expenses of a boarding house are partly fixed and partly varying linearly with the number of boarders. The average…

If the difference between the average of x, y and y, z is 12, then the difference between x and z is :

The average of 6 numbers is 7. The average of three numbers of them is 5. What will be the average of remaining numbers?

The average weight of 12 parcels is 1.8 kg. Addition of another new parcel reduces the average weight by 50 gm. What is …

The average of two numbers is 6.5 and square root of their product is 6. What are the numbers?

In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the rate in the remaining 40 overs to…

Ten years ago, the ages of the members of a joint family of eight people added up to 231 years. Three years later, one m…