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