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Special Natural Numbers (Posted on 2007-10-14) Difficulty: 3 of 5
Find all natural numbers which can be written in the form (a+b+c)2/(abc) where a,b,c are also natural numbers.

See The Solution Submitted by Praneeth    
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Some were discovered.... | Comment 1 of 8

I have yet to find any natural number over 9 and for the natural number 7.  I do know that 1, 2, 3, 4, 5, 6, 8 and 9 can be expressed in the form (a+b+c)2/(abc).


  Posted by Dej Mar on 2007-10-14 22:59:29
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