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113 - Power of Cryptography
10161 - Ant on a Chessboard
253 - Cube painting
591 - Box of Bricks
573 - The Snail
10790 - How Many Points of Intersection?
11044 - Searching for Nessy
10719 - Quotient Polynomial
10916 - Factstone Benchmark
10970 - Big chocolate
10014 - Simple calculations