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?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

What has many keys but can’t open a single lock?

Readers with the most attentive eyes can find three differences between the pictures of a cat on a box. Test your observation power now!

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

What does Alexander the Great and Winnie the Pooh have in common?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Which is the correct shadow of the bird?