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