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