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