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