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2. File:Feynman long division puzzle.svg - Wikipedia

   en.wikipedia.org/wiki/File:Feynman_long_division...

   Feynman long division puzzle: Image title: Richard Feynman's 1939 skeletal division puzzle for his father, redrawn by CMG Lee. Each A represents the same digit, and each dot any digit not represented by A. Width: 100%: Height: 100%

3. Sam Loyd - Wikipedia

   en.wikipedia.org/wiki/Sam_Loyd

   Download as PDF; Printable version; ... dropped the "Jr" from his name and started publishing reprints of his father's puzzles. [4] ... 1. Nf3 Be1 2. Nxe1 Kh4 3. h3 ...

4. Timothy Parker (puzzle designer) - Wikipedia

   en.wikipedia.org/wiki/Timothy_Parker_(puzzle...

   By early 1997, Parker’s puzzle became the "Universal Crossword" syndicated by Universal Press Syndicate to newspapers and clients worldwide. In 1999, together with Universal Press Syndicate’s Uclick division, Parker founded The Puzzle Society, and is the founder and senior editor of the Universal Uclick line of crossword puzzles and games.

5. The monkey and the coconuts - Wikipedia

   en.wikipedia.org/wiki/The_monkey_and_the_coconuts

   n 5 n 4 n 3 4 4 0 s 4 s 3 s 2 4 4 4 1 But the same reasoning again applies to N' as applied to N, so the next digit of N' is 4, so s 2 and n 3 are also 4, etc. There are 5 divisions; the first four must leave an odd number base 5 in the pile for the next division, but the last division must leave an even number base 5 so the morning division ...

6. KenKen - Wikipedia

   en.wikipedia.org/wiki/KenKen

   As in Sudoku, the goal of each puzzle is to fill a grid with digits –– 1 through 4 for a 4×4 grid, 1 through 5 for a 5×5, 1 through 6 for a 6×6, etc. –– so that no digit appears more than once in any row or any column (a Latin square). Grids range in size from 3×3 to 9×9.

7. Soma cube - Wikipedia

   en.wikipedia.org/wiki/Soma_cube

   Similar to Soma cube is the 3D pentomino puzzle, which can fill boxes of 2×3×10, 2×5×6 and 3×4×5 units. The Bedlam cube is a 4×4×4 sided cube puzzle consisting of twelve pentacubes and one tetracube. The Diabolical cube is a puzzle of six polycubes that can be assembled together to form a single 3×3×3 cube.