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