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