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