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