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