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