Fun and Interesting facts about Numbers

Fun and interesting facts:

0 - Zero was not even considered a number for the Ancient Greeks. However, they also questioned whether 1 was a number.

1 – The number 1 is NOT prime number, as many people believe. It is also the exact amount of butler schools in the US and the number of public telephones in Kabul.

Square root 2 (or 1.41...) - … is also called Pythagoras' constant. Paper sizes (A4, A3 etc.) are all based on a single aspect ratio of the square root of two.

1.618… - The golden ratio between two quantities (such as lengths) often appears in nature (tree branches, uncurling ferns, pine cone arrangements, etc.) and has been used throughout history to create aesthetically pleasing designs and art works such as Leonardo da Vinci’s Mona Lisa. It’s even used in analysing modern financial markets.

4 - The four-second rule is the amount of time that internet user will wait for a page to load before leaving and going to another site. And a dollar bill can be double folded (forward and backwards) 4x103 times before it will tear.

5 – The number of baseball gloves that can be made from one cow.

9 - A paper cannot be folded more than 9 times. Try it!

13 - One of the most widespread superstitious beliefs is that the number 13 is unlucky. So common is this that many hotels and office buildings in Europe and the United States do not have a room number 13 or a floor 13.