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