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