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