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