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