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