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