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Points to Remember

  1. Pay close attention to the maximum or minimum number of elements in a group, for this is often the heart of the game.
  2. Grouping games are classified as those that divide the elements into two sets—Selection games—and those that divide the elements into three or more sets.
  3. A reciprocal condition affects both elements equally.
  4. Don’t interpret a nonreciprocal condition as reciprocal.
  5. The method of indirect proof is used often with grouping games.

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