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