Sunday Afternoon Maths LXI

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