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