Sunday Afternoon Maths LXI

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