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