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