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