It was a dark stormy night and a couple were in a car driving madly to a city. The car broke down and the husband had to go get help from someone who spoke his language. He was afraid to leave his wife alone in the car so he locked the car before leaving. When he came back, the car was in the same state as he had left it but his wife was dead, there was blood on the floor and there was a stranger in the car. What happened?

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

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

How many triangles are there on the puzzle below?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

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?

Through your logical capabilities, can you make 7 an even?

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

What 5-letter word typed in all capital letters can be read the same upside down?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?