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