Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

It is always ahead of me yet I can never see it. What is it?

What word does this rebus represent?

meta meta
meta meta

What goes up but never comes down?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Which part of London exists in France as well ?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

How many sides does a circle have?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?