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Forum URL: http://www.cut-the-knot.org/cgi-bin/dcforum/forumctk.cgi
Forum Name: Early math
Topic ID: 58
Message ID: 4
#4, RE: Just For Fun! Magic Y
Posted by Quintopia on Dec-03-04 at 06:28 PM
In response to message #3
Using addition, which is the only way it is solvable, gives:
7 is in the center.
The branches are permutations of (10,5,1), (4,9,2), and (2,6,8).