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