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