it's hard to describe without a graph- but let me try
#1- flat one coin on the table;
_
#2- holding 2 coins- face to face with your left hand- verticlly
#3- holding 2 coins- face to face with your right hand - verticlly
incline #2 coins ~20-40 degrees toward you
incline #3 coins ~20-40 degrees away from you
#2 coins 'kiss'#3 coins on their edges
sit #2 and #3 on #1
no sure if there are better solutions..this solution assumes coin thickness =0...
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本帖于 2010-04-08 17:51:58 时间, 由版主 于德利 编辑