Sunday Afternoon Maths XIII

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