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