Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Move four matchsticks to the below square to form three squares?

What has to be broken before you can use it?

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 is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

There are forty elephants and they have forty-fore heads. How can this be possible?

A father's child, a mother's child, yet no one's son.

Who am I?

O_er_t_o_

Complete the missing letters of the given word.

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?