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