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

Where do fish keep their money?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

How many times can you subtract the number 5 from 25?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?