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