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