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