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