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