GOLDEN RATIO:
The Golden ratio is one of the most interesting and important number in mathematics.
In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities.
a/b=(a+b)/a
RATIO : (1+√5)/2=1.618
This number is pretty amazing. Isn't it?
The golden ratio can be found in the architecture of monuments like the Pyramids of Egypt.

The ratio has it's presence in the flower petals, seed heads, the honeycomb and many other things related to nature.

The painting of Mona Lisa has the Golden Ratio.

There is a close relationship between Golden ratio and Fibonacci sequence. If you take a closer look at the ratios of a fibonacci number and its previous, you will find that it converges to golden ratio. In fact the larger the number gets, the more closer we get to the Golden ratio.
Ever wondered how the logo of Apple Inc. was made? Here it is how.
Credits: Google Images.