Replace the question mark with the correct number.

What is the word or phrase?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

I shave every day, but my beard stays the same. What am I?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

In the four images below, can you find the odd one out?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

John was piloting a plane behind a car but was never able to overtake it. Why?