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