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