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