There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Which digit occurred maximum times between the number 1 and 1000?

If eleven plus two equals one, what does nine plus five equal?

Spot 5 differences in two Christmas tree below:

What always comes into a house through the keyhole?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

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

The host of a game show, offers the guest a choice of three doors. Behind one is a 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?