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2. Recreational mathematics - Wikipedia

   en.wikipedia.org/wiki/Recreational_mathematics

   Some of the more well-known topics in recreational mathematics are Rubik's Cubes, magic squares, fractals, logic puzzles and mathematical chess problems, but this area of mathematics includes the aesthetics and culture of mathematics, peculiar or amusing stories and coincidences about mathematics, and the personal lives of mathematicians.

3. Polyominoes: Puzzles, Patterns, Problems, and Packings

   en.wikipedia.org/wiki/Polyominoes:_Puzzles...

   Senger adds that the second edition is especially welcome because of the difficulty of finding a copy of the out-of-print first edition. [7] Although the book concerns recreational mathematics, reviewer M. H. Greenblatt writes that its inclusion of exercises and problems makes it feel "much more like a text book", but not in a negative way. [4]

4. Big Ideas Learning - Wikipedia

   en.wikipedia.org/wiki/Big_Ideas_Learning

   In September 2006, NCTM released Curriculum Focal Points for Prekindergarten through Grade 8 Mathematics: A Quest for Coherence. In the Focal Points, NCTM identifies what it believes to be the most important mathematical topics ("the big ideas") for each grade level, including the related ideas, concepts, skills, and procedures that form the ...

5. Mathematical chess problem - Wikipedia

   en.wikipedia.org/wiki/Mathematical_chess_problem

   The most famous problem of this type is the eight queens puzzle. Problems are further extended by asking how many possible solutions exist. Further generalizations apply the problem to NxN boards. [3] [4] An 8×8 chessboard can have 16 independent kings, 8 independent queens, 8 independent rooks, 14 independent bishops, or 32 independent ...

6. Cross-figure - Wikipedia

   en.wikipedia.org/wiki/Cross-figure

   Example grid for a cross-figure puzzle with some answers filled in. A cross-figure (also variously called cross number puzzle or figure logic) is a puzzle similar to a crossword in structure, but with entries that consist of numbers rather than words, where individual digits are entered in the blank cells.

7. Missing square puzzle - Wikipedia

   en.wikipedia.org/wiki/Missing_square_puzzle

   Animation of the missing square puzzle, showing the two arrangements of the pieces and the "missing" square Both "total triangles" are in a perfect 13×5 grid; and both the "component triangles", the blue in a 5×2 grid and the red in an 8×3 grid. The missing square puzzle is an optical illusion used in mathematics classes to help students ...