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