**30 ***Amazing Facts* Mathematics | *Amazing Facts 4U*

*Amazing Facts*Mathematics |

*Amazing Facts 4U*

- Notches (cuts or indentation) on animal bones prove that humans have been doing mathematics since around 30,000 BC.
- The
*amazing fact*is that the concept of 0 (zero) was introduced in India as early as the 3rd century B.C. It was passed on to the Arabian scholars and also to the Chinese in the 9th century A.D. European scholars grasped the importance of zero in the 10th century A.D. - Arabic numerals
*amazingly*are not really Arabic; they were invented in India. Aryabhata is the father of the Hindu-Arabic number system which has become universal today. *Amazing fact*is that Roman numerals have no zero (0) representation.*Amazingly*the name of the popular search engine ‘Google’ came from a misspelling of the word ‘googol’, which is a very large number to describe a one followed by 100 zeroes . It was first used by a 9 year old, Milton Sirotta, in 1940.- Greek mathematician Euclid is often referred to as the ‘Father of Geometry’ for his revolutionary ideas and influential textbook called ‘Elements’ that he wrote around the year 300 BC.
- Algebra , Calculus and Trigonometry are all inventions
*amazingly*coming from India. *Amazingly*ancient Babylonians did math in base 60 instead of base 10. That’s why we have 60 seconds in a minute and 360 degrees in a circle.- The word ‘hundrath’ in Old Norse, from which our ‘hundred’ derives,
*amazingly*meant not 100 but 120. - The symbols used for addition (+) and subtraction (-) have been around for thousands of years.
- The = sign (“equals sign”) was invented by Welsh mathematician Robert Recorde, who was fed up with writing “is equal to” in his equations. He first used it in 1557.
- In 1642 French mathematician Blaise Pascal invented the mechanical calculator.
- If all the numbers are arranged in alphabetical order, it is
*amazing*to find that eight would be the first and Zero would be the last. - A, B, C, and D are all very uncommon in English spellings of numbers .The letter ‘D’
*amazingly*does not appear until the number 100 (hundred). The letter ‘A’ is not used until the number 1,000 (thousand). Absolutely a*mazing fact*thing is that ‘B’ does not show up until 1,000,000,000 (billion), and ‘C’ is not found until 1 octillion! That’s 10 to the 27th power or 1,000,000,000,000,000,000,000,000,000. *Amazingly*Forty is the only number which has its letters in alphabetical order. “One” is the only number with its letters in reverse alphabetical order.- Four is the only digit that has the same number of letters as its value.
- “Eleven plus Two” and “Twelve Plus One” both equal 13. Both have thirteen letters and letters are the same.
- “Nineteen letters long” is
*amazingly*19 letters long. - A “hairbreadth away” is 1/48 of an inch.
- It is
*amazing*to find that there are 293 ways to make change for a dollar. - If you have a pizza with radius Z and thickness A, it’s
*amazing*to find it’s volume as Pi*Z*Z*A. - In 1900, all the world’s mathematical knowledge could be written in about 80 books. The
*amazing fact*is that today it would fill more than 100,000 books. - It is absolutely
*amazing fact*that a Rubik’s Cube can make 43,252,003,274,489,856,000 different combinations! *Amazingly*the opposite sides of a dice always add up to seven.- If two quantities have a ratio of approximately 1.618, they are said to be in the golden ratio. This ratio has been used throughout history to design aesthetically pleasing art works.
- Among all shapes with the same perimeter a circle has the largest area. Among all shapes with the same area circle has the shortest perimeter.
- In 1995 in Taipei, citizens were allowed to remove ‘4’ from street numbers because it sounded like ‘death’ in Chinese. It is
*amazing*to find that many Chinese hospitals do not have a 4th floor. - The Fibonacci sequence are numbers where each following number is the sum of the previous two : i.e. 0 1 1 2 3 5 8 13 21 34 55 89 etc.
- A Palindrome Number is a number that reads the same backwards and forward, e.g. 13431.
- If a class has 23 students in it then the probability that at least two of the students share a birthday is about 0.5. If there are 50 students in a class then it’s virtually certain that two will share the same birthday. This seems
*amazing*but has been absolutely proved correct.

*By Amazing Facts 4U Team*

*By Amazing Facts 4U Team*