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