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