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