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