There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

What number should come in place of the question mark below?

Can you write down eight eights so that they add up to one thousand?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

In the picture given below, can you find out which digit will take place of the question mark?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

John is on an island and there are three crates of fruit that have washed up in front of him. One crate contains only apples. One crate contains only oranges. The other crate contains both apples and oranges.

Each crate is labelled. One reads 'apples', one reads 'oranges', and one reads 'apples and oranges'. He know that NONE of the crates have been labeled correctly - they are all wrong.

If he can only take out and look at just one of the pieces of fruit from just one of the crates, how can he label all of the crates correctly?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?