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