What happened when the wheel was invented?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

A bomb exploded in a room full of married couples and no one died. How?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

I am an odd number. Take away a letter and I become even. What number am I?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?