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