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