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