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Some of the great puzzles with answers, and explanations in some cases

puzzle 1

There are 3 men in a room and 5 hats
3 hats are red and 2 hats are white
each man is wearing a hat and two hats are concealed.

Each man can see the hats that the other two are wearing but he cannot see his own.

No man can see the concealed hats!

when asked the question "what colour hat are you wearing ?" the first two men reply "I have no way of knowing ". the third man however knows exactly the colour of his hat.

What colour is his hat and how does he know?

(Don't distract yourself wondering about mirrors or other things this is simply a logical deductive reasoning problem)



Puzzle 2

 Switches and lights

There’s a standard filament-type light bulb in a closed room upstairs. It is controlled by one of three standard on-off switches downstairs. You are downstairs.  How can you discover for certain which switch controls the light by operating one or more switches, and then taking only one trip upstairs into the closed room?


Puzzle 3

A Genius is out running

A genius is out running along a railway track at his own constant speed of 10mph.He arrives at a tunnel and continues running. After he gets 2/3rd of the way into the tunnel,he hears the sound of an approaching train.Being a genius he immediately assesses his options.If he goes back he will just exit the tunnel as the train enters and if he continues forward he will just exit the tunnel as the train exits.

What speed is the train traveling?






Puzzle 4



A tramp collects cigarette butts on the sidewalks and for every 5 butts he finds he can make and smoke a new cigarette. How many cigarettes can he make is he collects 25 butts?




puzzle 5


You have a string-like fuse that burns in exactly one minute. The fuse is inhomogeneous, and it may burn slowly at first, then quickly, then slowly, and so on. You have a box

of matches, and no watch. How do you measure exactly 30 seconds? 











Puzzle page 2










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