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