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