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