Sunday Afternoon Maths LXI

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