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