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