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