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