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