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