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Best Answer CaptainEd, 15 February 2013 - 04:56 PM
bonanova
Posted 15 February 2013 - 07:12 AM
I put a handful of pennies on the table and I wondered whether I could group them so that each penny touched three and only three of the others. It took a while but I found it was possible. I then wondered whether I could do it with fewer pennies. It was clear that I could not.
How many pennies were in the group?
Advanced Member
Posted 15 February 2013 - 02:50 PM
Is it required for each coin to touch fully table surface with one of its faces?
Senior Member
Posted 15 February 2013 - 04:56 PM Best Answer
Senior Member
Posted 15 February 2013 - 05:02 PM
Past prime, actually.
Advanced Member
Posted 15 February 2013 - 05:22 PM
Can you prove, that required arrangement is not possible with odd number of coins?
bonanova
Posted 15 February 2013 - 07:57 PM
bonanova
Posted 15 February 2013 - 08:02 PM
Outside the box; off the table.Spoiler for the fewest
Senior Member
Posted 15 February 2013 - 08:41 PM
Spoiler for Sure
Completely off the topic, a technical issue. I cannot see the contents of the spoiler in the post. It appears as empty line. When I "quote" the post, the spoiler becomes visible inside the "quote".
Past prime, actually.
bonanova
Posted 15 February 2013 - 11:28 PM
There do seem some irregularities with the site. I can see the contents.
You might send a PM to Rookie1ja with your specifics.
I would have, instead of this post, but I don't know how simultaneously to PM to two people. 
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