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