Which no is known as the magic no?

Answer 1

1/2 of [ 1 + sqrt(5) ]

= 1.618033989 (rounded)

-- It's '1' more than its own reciprocal.

-- It's the solution of x2+x-1=0

-- It's the limit of the ratio of two consecutive terms of the Fibonacci series.

-- It's the 'magic ratio' of classical Greek architecture, thought to be the ratio of

width to length that produces the rectangle most pleasing to the eye, and seen

in buildings on the Acropolis.