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