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