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Usenet Newsgroups : rec.puzzles Hall of Fame

The rec.puzzles Hall of Fame is a compilation of over 500 of the most popular puzzles that have been posted and discussed in the rec.puzzles newsgroup. In most cases a detailed solution has been provided.

Many of these puzzles also appear in Braingle's own collection.

Hall of Fame
Categories : combinatorics : subsets.p

Out of the set of integers 1,...,100 you are given ten different
integers.  From this set, A, of ten integers you can always find two
disjoint non-empty subsets, S & T, such that the sum of elements in S
equals the sum of elements in T.  Note: S union T need not be all ten
elements of A.  Prove this.


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