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