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