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