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