Sunday Afternoon Maths XXXVI

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