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