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