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Solution Puzzle L-3.  CARDS

You have a set of 10 cards, all spades, from ace to 10, and no face cards.  Separate the cards into two sets of five, so that the first set sums to 26 and the second set sums to 29.

This is a partition problem, and the solution is the following:

2 + 3 + 5 + 7 + 9 = 26

1 + 4 + 6 + 8 + 10 = 29


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Bits and Beyond ... 

Mistakes are at the very base of human thought, embedded there, feeding the structure like root nodules. If we were not provided with the knack for being wrong, we could never get anything useful done.  We think our way along by choosing between right and wrong alternatives, and the wrong choices have to be made as often as the right ones. We get along in life this way. 

                          Lewis Thomas


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