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Ken's Puzzle of the Week

Magic Snowflake

Put the numbers 1-13 at the corners of the 6-pointed snowflake to make each
diamond have the same sum. Minimize the common sum.

To compare answers, rotate & reflect your solution to put the smallest number
the top, and the next smallest clockwise.

Extension (added 6Feb2009): Find solutions for all possible sums.

Source: Original.

Solution

Mail to Ken