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Prime Perimeter (Posted on 2005-03-11) Difficulty: 3 of 5

You and two other people have numbers written on your foreheads. You are all told that the three numbers are primes and that they form the sides of a triangle with a prime perimeter. You see 5 and 7 on the other two heads and both of the other people agree that they cannot deduce the number on their own foreheads.

What is the number written on your forehead?

See The Solution Submitted by Erik O.    
Rating: 2.8235 (17 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(2): full solution - to Hugo again | Comment 14 of 89 |
(In reply to re: full solution by Hugo)

I saw "exagerate" refering to "nice piece of work", Hugo.

I agree with all your considerations !!!!


  Posted by pcbouhid on 2005-03-11 21:52:53
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