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