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