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