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products planes median probability irreducible numbers means factorials menace digital products binary range people maths geometric mean square roots clocks cryptic crossnumbers hexagons grids regular shapes scales dates odd numbers angles axes addition wordplay even numbers consecutive numbers palindromes medians folding tube maps quadrilaterals geometric means factors time cards floors polynomials multiples sets combinatorics mean numbers rectangles coordinates tournaments games sequences dominos routes chalkdust crossnumber calculus remainders coins colouring partitions doubling percentages cryptic clues logic perimeter parabolas lines graphs trigonometry spheres cubics square numbers ellipses multiplication surds triangles perfect numbers elections crossnumbers neighbours squares christmas cube numbers 3d shapes bases geometry averages balancing sport tiling digits digital clocks division triangle numbers speed fractions functions arrows quadratics taxicab geometry 2d shapes polygons numbers grids proportion area tangents integers complex numbers pentagons sums pascal's triangle determinants indices ave unit fractions rugby albgebra algebra star numbers shapes consecutive integers circles chocolate chess money integration square grids shape powers dodecagons symmetry decahedra books gerrymandering probabilty expansions matrices crosswords sum to infinity differentiation the only crossnumber dice number prime numbers advent volume