Why is the Hole below a Lock?

Find the value of "?" in the ball picture Riddle below:

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

John is on an island and there are three crates of fruit that have washed up in front of him. One crate contains only apples. One crate contains only oranges. The other crate contains both apples and oranges.

Each crate is labelled. One reads 'apples', one reads 'oranges', and one reads 'apples and oranges'. He know that NONE of the crates have been labeled correctly - they are all wrong.

If he can only take out and look at just one of the pieces of fruit from just one of the crates, how can he label all of the crates correctly?

There was a competition where the contestants had to hold something. At the end of the event, the winner was a person who had no hands or feet. What was it that the contestants had to hold?

What is so fragile that saying its name breaks it?

What is the difference between a jeweller and a jailer?

Move three sticks of the spiral below to form a square.

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Why do we preferably have round manhole covers and not square ones?