Number of Rectangles on a chess board

Earlier we discussed, how to calculate total number of squares (of all sizes) on the chess board. Here, the problem is, How many rectangles (of […]
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Honest man playing card puzzle

An honest man holds a card which can be either ‘1‘, ‘2‘ or ‘3‘. You can ask one (and only one) question to the man. The […]
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Chess board puzzle

Imagine you have infinite number of Queens. Find the minimum number of queens required so that every square grid on the chess board is under […]
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Ages of three children

A lady has 3 daughters, A man visited their house and asked the ages of her three daughters. The lady started giving him clues: Lady: […]
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Cheating Husband puzzle

A certain town has 100 married couples (husband and wife only). Everyone in the town lives by the following rule: If a husband cheats on his wife, […]
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Dropping egg puzzle

You have two identical eggs and access to a 100 floor building. You don’t know how strong the eggs are. Eggs can be really strong […]
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Blue Eyed Islanders puzzle

1000 tribal people lives on an island. Out of them 100 have blue eyes and 900 has black colored eyes. Their religion forbids them to […]
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Burning Rope puzzle

You have two identical ropes, which are non-uniform in composition. Each rope takes 60 minutes to burn (But non-uniformly, for example: 90% of the rope […]
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N Doors Puzzle

There are N doors in a row, numbered from 1 to N. Initially all are closed. Then you make N passes by N doors. In […]
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camel & banana puzzle

A Camel has to transport 3000 bananas from point A to point B, both 1000km apart. There are few constraints There is only one Camel. […]
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