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