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