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