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