Sunday Afternoon Maths LXI

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