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