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Get one half by squaring (Posted on 2004-09-20) Difficulty: 4 of 5
Can you solve the following equation?

= 1/x + 1/y +...+ 1/z

All variables must be different, positive integers, and there must be a finite number of terms.

See The Solution Submitted by Federico Kereki    
Rating: 4.2500 (12 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts Less than 9? | Comment 29 of 31 |
It's obvious that with 5 numbers you cannot get 1/2 (since 1/2²+1/3²+1/4²+1/5²+1/6²<1/2) but I'm trying to prove that you cannot do it with 6 either... still trying!
  Posted by e.g. on 2004-09-30 14:47:33
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