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