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