There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

What demands an answer, but asks no questions

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Replace the question mark with the number below given a simple math problem.

There is something which you can be arrested for attempting but not for successfully completing.

Name a key which is hardest to turn.

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?