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