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