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