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