Sunday Afternoon Maths LXI

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