INTERESTING FACTS ABOUT MATHEMATICS
1 ) 111,111,111 x 111,111,111 = 12,345,678,987,654,321.
2) 1089 x 9 = 9801.
3) If you have Pizza with radius Z and thickness A , its volume is = Pi *Z *Z * A
4) 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.
5) 2,520 is the smallest number that can be exactly divided by
all the numbers 1 to 10.
6) 123 - 45 - 67 + 89 = 100.
123 + 4 - 5 + 67 - 89 = 100.
123 - 4 - 5 - 6 - 7 + 8 - 9 = 100.
1 + 23 - 4 + 5 + 6 + 78 - 9 = 100.
7) In 1900, all the world's mathematical knowledge could be
written in about 80 books; today it would fill more than 100,000 books.
8) The birthday paradox says that in a group of just 23 people,
there's a 50% chance that at least two will have the same birthday.
9) Multiplying 21978 by 4 reverses the order of the numbers:
87912.
10) 2200 years ago, Eratosthenes estimated the Earth's
circumference using math, without ever l leaving Egypt. He was remarkably
accurate. Christopher Columbus later studied him.
11)Mathematician Paul Erdos could calculate in his head, given
a person's age, how many seconds they had lived, when he was just 4 years old.
12)The largest prime number ever found is more than 22 million
digits long.
13) Arabic numerals, like the ones we use today in English, were
actually invented in India.
14) 2013 was the first year since 1432 that's a rearrangement of
four consecutive numbers.
15)Philosopher René Descartes is most well known for the saying
"I think, therefore I am," but he also developed the XY-coordinate
system.
16)In many Israeli schools, algebra is taught without the use
of the symbol "+" as it looks like a Christian cross. They use an
inverted "T" instead.
17)The word ‘hundred' derives from ‘hundra' in Old Norse, which
originally meant 120.
18)Newton invented/discovered calculus in about the same amount
of time the average student learns it.
