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