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