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Simple but fun math problem

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Author Topic:   Simple but fun math problem
Neutralmind
Member (Idle past 6154 days)
Posts: 183
From: Finland
Joined: 06-08-2006

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Message 2 of 21 (388683)
03-07-2007 8:35 AM

I can't even think of one... I can't understand how this is simple for anyone.
Though, I barely passed short mathematics in upper secondary school
  
Neutralmind
Member (Idle past 6154 days)
Posts: 183
From: Finland
Joined: 06-08-2006

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Message 7 of 21 (388692)
03-07-2007 10:00 AM

Oh, I thought you could only change the last -/+ mark. No wonder it felt impossible.
  
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