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