Interesting Mathematical Facts

1)  '0' is the only number which can not be represented by Roman numbers.

2)  'Plus' & 'Minus' sign symbol were used as early as 1498 AD.

3)  2 & 5 are the only primes, that ends in 2 & 5.

4)  Among all shapes with the same parameters a circle has the largest area.

5) The number on opposite faces of a dice, always add upto seven (7)

6) From '0' to '1000' the letter "A" only appears in 1000 ( one thousands)

7).  0.999999... is exactly equal to one (1)

8)  If you fold a paper 103 times, it would be the thickness observable universe.

9)  The largest prime number ever found is more the 22 million.

10)  In a room of 23 people,
There 50% chance that 2 people have same birthday.

11).  "4" is considered unlucky in Asia.

12).   Forty is the only word that is spelt with letters arranged in alphabetical order.

13).  Every odd no. Has  "E" in it.

14).   Most popular favourite number is seven (7)

15).  Abacus is considered the origine of calculation.

16).  2520 is the smallest number that can be exactly divided by all the number "1-10"