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