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