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