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