Sunday Afternoon Maths LXI

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