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