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The materials for the include problems and solutions for both the Fall and Spring rounds.

A game theory problem between Alice and Bob involving a The materials for the include problems and solutions

A problem involving a 60-digit number made of ones and eights, requiring a proof of divisibility by a 30-digit number consisting only of nines. The materials for the include problems and solutions

A geometry problem about a regular octahedron with its faces divided into smaller triangles, asking for the maximum number of non-adjacent triangles that can be colored. The materials for the include problems and solutions