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