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Number crunching curios
December 16, 2013 at 7:14 am
Our recent numerologist member made me remember this curious calculation, that all kids adore!
12345679 * 9 = 111111111
Now, if you multiply by any number, you get all 2, 3, 4, 5, 6, 7, 8, or 9
12345679 * 18 (this is 9*2) = 222222222
12345679 * 27 (9*3) = 333333333
12345679 * 36 (9*4) = 444444444
12345679 * 45 (9*5) = 555555555
12345679 * 54 (9*6) = 666666666
12345679 * 63 (9*7) = 777777777
12345679 * 72 (9*8) = 888888888
12345679 * 81 (9*9) = 999999999
And another cool detail:
12345679 * 9 * 9 * 12345679 = 12345678987654321
Go wild and post your number crunching curiosities! 
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RE: Number crunching curios
December 16, 2013 at 7:24 am
(December 16, 2013 at 7:14 am)pocaracas Wrote: Our recent numerologist member made me remember this curious calculation, that all kids adore!
12345679 * 9 = 111111111
Now, if you multiply by any number, you get all 2, 3, 4, 5, 6, 7, 8, or 9
12345679 * 18 (this is 9*2) = 222222222
12345679 * 27 (9*3) = 333333333
12345679 * 36 (9*4) = 444444444
12345679 * 45 (9*5) = 555555555
12345679 * 54 (9*6) = 666666666
12345679 * 63 (9*7) = 777777777
12345679 * 72 (9*8) = 888888888
12345679 * 81 (9*9) = 999999999
And another cool detail:
12345679 * 9 * 9 * 12345679 = 12345678987654321
Go wild and post your number crunching curiosities! I thought the "times tables" went up to 12 for younglings? I am only 25 so this isn't a "when I was at school" rant, nobody else have to go to 12?
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RE: Number crunching curios
December 16, 2013 at 7:27 am
I'm too old for that... In my days, all tables only went up to 10... And 10 wouldn't work as pleasantly here, but feel free to try it out!
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RE: Number crunching curios
December 16, 2013 at 7:36 am
9 is an interesting number.
09= 0+9=9
18= 1+8=9
27= 2+7=9
36 =3+6=9
45 =4+5=9
54 =5+4=9
63 =6+3=9
72 =7+2=9
81 =8+1=9
90 =9+0=9
You'll also notice that the numerals mirror image each in the columns and complete numerical sequences.
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RE: Number crunching curios
December 16, 2013 at 7:52 am
(This post was last modified: December 16, 2013 at 7:52 am by Kayenneh.)
Tap 5318008 into a calculator and turn it upside down. Now there's a number with true power! 
When I was young, there was a god with infinite power protecting me. Is there anyone else who felt that way? And was sure about it? but the first time I fell in love, I was thrown down - or maybe I broke free - and I bade farewell to God and became human. Now I don't have God's protection, and I walk on the ground without wings, but I don't regret this hardship. I want to live as a person. -Arina Tanemura
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RE: Number crunching curios
December 16, 2013 at 8:56 am
(December 16, 2013 at 7:52 am)Kayenneh Wrote: Tap 5318008 into a calculator and turn it upside down. Now there's a number with true power!
It is 100% proof of my religion! 
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RE: Number crunching curios
December 16, 2013 at 9:13 am
It works the other way round too.
Type BOOBIES into a word processor and stand on your head.
Kuusi palaa, ja on viimeinen kerta kun annan vaimoni laittaa jouluvalot!
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RE: Number crunching curios
December 16, 2013 at 10:20 am
And the fun of dividing by nine, too.
1/9 = 0.111111...
2/9 = 0.222222...
3/9 = 0.333333...
4/9 = 0.444444...
5/9 = 0.555555...
6/9 = 0.666666...
7/9 = 0.777777...
8/9 = 0.888888...
9/9 = 0.999999...
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Science is not a subject, but a method.
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RE: Number crunching curios
December 16, 2013 at 10:25 am
(December 16, 2013 at 7:36 am)Zen Badger Wrote: 9 is an interesting number.
You'll also notice that the numerals mirror image each in the columns and complete numerical sequences.
This made me think of a trick for multiplying with 9. Put your hands in front of you, all fingers stretched. If you want to know what e.g. 3x9 is, you just fold your third finger from the left (the left hand middle finger). Two fingers remain on the left side of the folded finger, seven on the right, so 3x9=27. Pretty neat
When I was young, there was a god with infinite power protecting me. Is there anyone else who felt that way? And was sure about it? but the first time I fell in love, I was thrown down - or maybe I broke free - and I bade farewell to God and became human. Now I don't have God's protection, and I walk on the ground without wings, but I don't regret this hardship. I want to live as a person. -Arina Tanemura
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RE: Number crunching curios
December 16, 2013 at 10:27 am
(December 16, 2013 at 10:20 am)Chas Wrote: And the fun of dividing by nine, too.
9/9 = 0.999999... No, no, no, no ,no, no!
9/9 = 1
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