Sunday Afternoon Maths LXI

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