Sunday Afternoon Maths XXXVII

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