John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Who is that with a neck and no head, two arms and no hands? What is it?

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?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

Why is it very easy to weigh a fish?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

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