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