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