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