Sunday Afternoon Maths LXI

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