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