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