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