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