What does does this rebus picture means ?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

I am the fastest animal but cannot climb the tree. What am I?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

Can you find a five letter word that is left with only two letters if one is removed?