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