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