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