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