Take away the whole and some still remain. What is it?

How can one talk without saying a single word?

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 is the difference between a jeweller and a jailer?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

If an electric train is travelling south, then which way is the smoke going?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What have one eye but still cannot see?