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