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