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