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