What is full of holes but still holds water?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Why is the Hole below a Lock?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

A and B have a certain number of chocolates with them. If B gives one chocolate to A, they will have an equal number of chocolates. But if A gives one chocolate to B, then A will be left with half the number of chocolates that B has.

Can you find out the number of chocolates they have right now?

If two's company, and three's a crowd, then whats four and five ?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

10+10 and 11+11 can give you the same answer.

Explain how?

What is the next number in this series?

4,12,84,3612....