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?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

Do you know who was buried in John's tomb?

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

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?