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Add one more circle (Posted on 2017-05-21) Difficulty: 4 of 5
A 2 by X rectangle can obviously have 2*X circles of diameter 1 placed inside it without overlapping. What is the smallest integer X where a 2 by X box can have 2*X+1 non-overlapping circles placed inside it?

No Solution Yet Submitted by Brian Smith    
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re: Then again...on second thought | Comment 4 of 5 |
(In reply to Then again...on second thought by Caleb)

More precisely, I can fit an infinite number of non-overlapping circles into such a rectangle. It does give *that* as a requirement. :P
  Posted by Caleb on 2017-05-23 01:04:26

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