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?

What does a man do only once in his lifetime, but women do once a year after they are 29?

Can you count the number of triangles in the picture below?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Why are all black people so quick ?

Give it food and it will live; give it water and it will die.

What seven-letter word has hundreds of letters in it?

Can you solve the below tricky visual equation?

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

In a family supper, a grandfather, a grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one daughter-in-law, and one mother-in-law need to sit at a table.

There are only seven chairs available at the place. How many more chairs do they have to borrow so that everyone can sit down together for the suppers if everybody requires a separate chair?