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