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To propose a problem, please send an email to the moderators, with a short title. Problems proposed in contemporary issues of various mathematical journals inviting solutions from readers should not be discussed in POLYA. If you know of any such problems in this Inventory or the Problem Center, please notify us, and we shall put them in the Reserve Area.

The Inventory

• Inventory021: Probability about a sequence (proposed by Roger Cuculière)
  
• Inventory020: Heronian triangle with area equal to the square of a side (proposed by Floor van Lamoen)
• Inventory019: A graph theory problem (proposed by Santi Spardo)
• Inventory018: Small subsets of {1,2,3,4,5,6,7,8} (proposed by Han-Dieter Gronau)
• Inventory017: A problem in the triangular grid (proposed by Stephen C. Locke)
• Inventory015: Best fitting rectangles to a triangle (Proposed by Floor van Lamoen)
• Inventory013: Embedding 5-element metric spaces (proposed by Li Zhou)
• Inventory012: Another variant of nim (proposed by Stephen C. Locke)
• Inventory007: Amalgamation nim (proposed by Stephen C. Locke)
• Inventory001: Egyptian numbers (proposed by Paul Yiu; last update: 11/8/01)