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