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