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