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