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