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