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