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