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