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