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