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