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