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