There are so many fun and strange math related facts out there that are very interesting for all age of people. Here we have a list of several cool facts about mathematics which you love most.

- The numerical digits we use today such as 1, 2 and 3 are based on the Hindu-Arabic numeral system developed over 1000 years ago.
- “Forty” is the only number that is spelt with letters arranged in alphabetical order.
- “one” is the only number that is spelt with letters arranged in descending order.
- “Four” is the only number in the English language that is spelt with the same number of letters as the number itself.
- Every odd number has an “e” in it.
- From 0 to 1000, the only number that has the letter “a” in it is “one thousand”.
- Zero is not represented in Roman numerals.
- The word “mathematics” only appears in one Shakespearean play, “The Taming of the Shrew”.
- -40 °C is equal to -40 °F.
- 2 and 5 are the only prime numbers that end in 2 or 5.
- A “jiffy” is an actual unit of time. It means 1/100th of a second.
- In France, a pie chart is sometimes referred to as a “camembert”.
- What comes after a million, billion and trillion??? its quadrillion, quintillion, sextillion, septillion, octillion, nonillion, decillion and undecillion.
- An icosagon is a shape with 20 sides.
- 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.
- 12,345,678,987,654,321 is the product of 111,111,111 x 111,111,111. Notice the sequence of the numbers 1 to 9 and back to 1.
- Have you ever noticed that the opposite sides a die always add up to seven (7).
- Abacus is considered the origin of the calculator.
**Magic of 9**. Multiply any number with nine (9 ) and then sum all individual digits of the result (product) to make it single digit, the sum of all these individual digits would always be nine (9).- The sum of numbers 1-100 ( 1+2+3+4+5+ …. +100) is 5050.
**Palindrome Number :**It is a number that reads the same backwards and forward, e.g. 12421.**Fibonacci Series :**It is the sequence of numbers wherein a number is the result of adding the two numbers before it! Here is an example: 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on.- The spiral shapes of sunflowers follow a Fibonacci sequence.
- The word “hundred” comes from the old Norse term, “hundrath”, which actually means 120 and not 100.
- In a room of 23 people there’s a 50% chance that two people have the same birthday.
- (6 × 9) + (6 + 9) = 69.
- 12 + 3 – 4 + 5 + 67 + 8 + 9 = 100
- The number 0.999999….. is exactly equal to 1

**Proof:**Let x=0.9999…

Then 10x = 9.9999…

10x-x =(9.9999…)-(0.9999…)

9x=9

x=1 - William Shanks calculated pi to 707 decimal places but made a mistake on the 528th digit.
- There are exactly 10! (10 factorial ie. 10*9*8*7*….*2*1) seconds in six weeks.
- If you divide any number by 7, and the answer isn’t an integer, you end up with the sequence 142857 recurring.

1/7 = .142857142857

2/7 = .285714285714

3/7 = .428571428571

4/7 = .571428571428

5/7 = .714285714285

6/7 = .857142857142

8/7 = 1.14285714285 - International Paper Sizes (e.g. A4) use a 1:√2 ratio. If you cut them in half crosswise, the same ratio will be maintained. It’s great for scaling up or down.
- There isn’t enough room in the universe to write down the number googolplex, even if each 0 was the size of an atom. Read more about googolplex.
- According to the Friendship Paradox, your friends have more friends than you.
- According to Zipf’s law: in a large, enough sample of text from any language, the most frequent word will occur twice as much as the second, three times as much as the third, four times as much as the fourth and so on.
- A baseball dimaond is a perfect rhombus.
- If you add 2 even numbers, you always get even number as result.
- if you add one even and one odd number, you always get odd number as result.
- 2 is the only prime number that is an even number.
- Greek Mathematician, Euclid is known as “Father of Geometry”.
- Different names for the number 0 include zero, nought, naught, nil, zilch and zip.
**Fun Numbers:**

1 x 8 + 1 = 9

12 x 8 + 2 = 98

123 x 8 + 3 = 987

1234 x 8 + 4 = 9876

12345 x 8 + 5 = 98765

123456 x 8 + 6 = 987654

1234567 x 8 + 7 = 9876543

12345678 x 8 + 8 = 98765432

123456789 x 8 + 9 = 987654321- The number 142857 is rather special. When you multiply it the digits found in the answer stay the same, just in a different order. Check it out:1 x 142857 = 142857

2 x 142857 = 285714

3 x 142857 = 428571

4 x 142857 = 571428

5 x 142857 = 714285

6 x 142857 = 857142What happens when you multiply it by 7? You get another rather special number:

7 x 142857 = 999999

And it doesn’t stop there:

142 + 857 = 999

14 + 28 + 57 = 99142857 x 142857 = 20408122449

20408 + 122449 = 142857

That’s one amazing number! **Big Numbers:**

1 = One

10 = Ten

100 = One hundred

1000 = One thousand

86400 = The number of seconds in a day

1000000 = One million

31556926 = The number of seconds in a year

1000000000 = One billion

7000000000 = The estimated human population on Earth (2011)

1000000000000 = One trillion

1000000000000000 = One quadrillion

1000000000000000000 = One quintillion

1000000000000000000000 = One sextillion

1000000000000000000000000 = One septillion

1000000000000000000000000000 = One octillion

1000000000000000000000000000000 = One nonillion

1000000000000000000000000000000000 = One decillion

1000000000000000000000000000000000000 = One undecillion

1000000000000000000000000000000000000000 = One duodecillion

1000000000000000000000000000000000000000000 = One tredecillion

1000000000000000000000000000000000000000000000 = One quattuordecillion

1000000000000000000000000000000000000000000000000 = One quindecillion

1000000000000000000000000000000000000000000000000000 = One sexdecillion

1000000000000000000000000000000000000000000000000000000 = One septendecillion

1000000000000000000000000000000000000000000000000000000000 = One octodecillion

1000000000000000000000000000000000000000000000000000000000000 = One novemdecillion

1000000000000000000000000000000000000000000000000000000000000000 = One vigintillion1000000000000000000000000000000000000000000000000000000000000000000

0000000000000000000000000000000000 = One googol (the number 1 followed by 100 zeros)1000000000000000000000000000000000000000000000000000000000000000000000

0000000000000000000000000000000000000000000000000000000000000000000000

0000000000000000000000000000000000000000000000000000000000000000000000

0000000000000000000000000000000000000000000000000000000000000000000000

000000000000000000000000 = One centillion (the number 1 followed by 303 zeros)One googolplex = The number 1 followed by a googol zeros (there literally isn’t enough room in the universe to write this number).

While not really a number, ‘infinity’ refers to a limitless quantity and is represented by a symbol that looks like the number 8 placed on its side.