Yesterday was our granddaughter's birthday. I was telling her what a special birthday it is because her birthday was on 9-9-18 (1+8=9).
Mathematics is so amazing!! Did you know that multiplying by 9 perpetuates 9s?
1x9=9 9+0=9
2x9=18 1+8=9
3x9=27 2+7=9
4x9=36 3+6=9
5x9=45 4+5+9
6x9=54 5+5=9
7x9=63 6+3=9
8x9=72 7+2=9
9x9=81 8+1=9
10x9=90 9+0=9
11x9=99 9+9=18=1+8=9
12x9=108
13x9=117
14x9=126 1+2+6=9
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21x9=189 1+8+9=18=1+9+9
.
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32x9=288 2+8+8=18=1+8=9
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Let's take a random number like 116.
116x9=1044 1+0+4+4=9
.
.
1167x9 = 10503 1+0+5+0+3+9
How about a really random number?
438675x9= 3948075 3+9+4+8+0+7+5=36 3+6=9
I think this is absolutely amazing!! I wish I understood why. Any comments?
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