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?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Can you move 2 matchsticks to form four equal sized squares.

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

Find the next number in the sequence

1, 2, 6, 21, 88, __?

In which direction should the missing arrow point?

Find the 8 in the below-given Image.

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?