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