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