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