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