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