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