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