Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

There was a strange boy who was born before his father. How can this be possible?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

It belongs to you, but other people use it more than you do. What is it?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

I make two people out of one. What am I?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?