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Every number has their own importance and they are very different from each other in different ways. Some of them have religious importance and some of them have importance which only at the belief of the people. These facts make these number more interesting. There is a big amount of people who believes that 7 is the most lucky number. Some of us believe that 13 is the most unlucky number. Though it depends only at the believe of a people. In this post we will discuss about the number 9. There are so much interesting matters about the number 9. In mathematics 9 is one of the most strange number too depending on it's characteristics.
Let's start....
* The first interesting fact about 9 is that it is the last number of single set in the mathematics. It is a motzkin number too.
* The second interesting fact lies in the table of 9. So, Follow the table of 9 :
9*1 =09 ; 0+9 =9
9*2 =18 ; 1+8 =9
9*3 =27 ; 2+7 =9
9*4 =36 ; 3+6 =9
9*5 =45 ; 4+5 =9
9*6 =54 ; 5+4 =9
9*7 =63 ; 6+3 =9
9*8 =72 ; 7+2 =9
9*9 =81 ; 8+1 =9
9*10 =90 ; 9+0 =9
If we follow the table of 9 we will find that the answer of multiplication are 09,18,27,36,45,54,63,72,81,90.If we add the 2 digits of the numbers we will find 9 as answer. This happens in every time when we multiply 9 with any number. Example:
9*32 =288 ; 2+8+8 =18 ; 1+8 =9
9*87 =783 ; 7+8+3 =18 ; 1+8 =9
9*41 =369 ; 3+6+9 =18 ; 1+8 =9
9*98 =882 ; 8+8+2 =18 ; 1+8 =9
9*65 =585 ; 5+8+5 =18 ; 1+8 =9
9*50 =450 ; 4+5+0 =9
*The most unique fact about 9 is that If we think about a number of 2 digit and exchange the position of the digits, then minus the 2nd number from the 1st number we will find a answer of two digit. If we add the 2 digits we will find 9. Example:
65-56 = 09 ; 0+9=9
81-18 = 63 ; 6+3=9
53-35 = 18 ; 1+8=9
93-39 = 54 ; 5+4=9
20-02 = 18 ; 1+8=9
37-73 = -36 ; 3+6=9
There are so much more to know about the numbers. Love math to love live.
We have a video on number 9.
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