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