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