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