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