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