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