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