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