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