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?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

I don't get anymore wetter, no matter how much rain falls on me.

There is something which you can be arrested for attempting but not for successfully completing.

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

Prove that twice of ten is the same as twice of eleven.