## Did you know?

### The magic of number nine Nine is an interesting natural number following 8 and preceding 10.

Multiply any natural number with 9, and if you sum the digits of the resultant value until it is just one number the answer will be always nine.

5 x 9 = 45(4 + 5 = 9)

8 x 9 =72(7 + 2 = 9)

104 x 9 = 936(9 + 3 + 6 = 18 =1 + 8 = 9)

8753634 x 9 = 78782706(7 + 8 +7 +8 + 2 + 7 + 0 + 6 = 45, 4 + 5 = 9)

78975134084 x 9 = 710776206756 = (7 + 1 + 0 + 7 + 7 + 6 + 2 + 0 + 6 + 7 + 5 + 6 = 54, 5 + 4 = 9)

Some other interesting facts involved in the multiples of nine are

12345679 x 9 = 111111111

12345679 x 18 = 222222222

12345679 x 81 = 999999999

Subtracting two base-10 positive integers that are transpositions of each other yields a number that is a whole multiple of nine. Examples:

64 – 46 = 18(1+8 = 9)

36957930 - 35967930 = 990000, (9+9 = 18, 1 + 8 = 9)

8965 – 5698 = 3267 (3 + 2 + 6 + 7 = 18, 1 + 8 = 9)

If you divide a number by the amount of 9s, corresponding to its number of digits, the number is turned into a repeating decimal. (e.g. 834/999 = 0.274274274274...)

#### Latest Facts ##### Paradox of even and natural numbers

We would often think that there are more number of natural numbers than the even numbers because nat... ##### Math madness 0 by 0 equals to 1 by 2

If this is proved to be correct, everything we have learned in our life so far in Mathematics will g... ##### Benfords law (first-digit law)

This will be one of the world most unexplained phenomena you would ever see. The miracle of numbers ...

#### Related Facts ##### Microwave oven by percy spencer

Percy Spencer, an American Engineer accidentally discovered Microwave Oven while working on Raytheon... ##### Maximum possible chess moves is 10921506 possible position after 7 moves

The number of possibility chess moves after the white move's is 20 (ie 4 knight moves and 16 moves o... ##### John nash - a beautiful mind

A Beautiful Mind is the movie based on the life of john nash, who is said to be Nobel Laureate in e... ##### Time dilation: your twin sibling will get more youthful than you

Your twin sibling will get more youthful than you when he returns from the space travel. If your twi... ##### Grigori yakovlevich perelman a mathematician to solve most difficult problems in topology

Grigori Yakovlevich Perelman is a Russian mathematician, who made a history in Riemannian geometry a...

Daily Maths Topic Today - the magic of number nine.