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

½ = 1/x² + 1/y² +...+ 1/z²

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 Puzzle Thoughts Comment 32 of 32 |
â–  CHARLIE has submitted a 35-term solution by way of simulation. 

The other valid solutions in the comments and official solution  are:

Rajal's 9-term solution
------------------------------------
1/2 = 2^(-2) + 3^(-2) + 4^(-2) + 5^(-2) + 7^(-2) + 8^(-2) +56^(-2)+168^(-2) + 840^(-2)

FK's 10-term official solution
----------------------------------------------
1/2 
= 2^(-2) + 3^(-2) + 4^(-2)+ 5^(-2)+6^(-2)+12^(-2)+30^(-2)+60^(-2)+75^(-2)+100^(-2)

e.g.'s 11-term solution
-----------------------------------
1/2 
= 2^(-2)+3^(-2)+4^(-2)+5^(-2)+6^(-2)+12^(-2)+
  30^(-2) + 50^(-2)+100^(-2)+150^(-2)+300^(-2)

Edited on September 8, 2022, 12:51 am
  Posted by K Sengupta on 2022-09-08 00:01:06

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