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