This post won't really be describing vortex mathematics, only to mention Marko Rodin and his Rodin Coil; he has many videos on YouTube introducing the concept, and how it can be used to make "over-unity" devices -- devices that give more power than they take to run.
Not "perpetual motion machines" because nothing runs forever -- over-unity devices will still have wear-and-tear to their parts, so they will not move perpetually. Somehow they obtain energy from somewhere we're currently unable to (e.g., zero point energy, as popularized in the kid's movie "Big Hero 6" which was also about father-and-son bonding over underwear recycling).
The reason I mention this, though, is that one technique that's used is to reduce a number to a single digit, by adding all the digits of the number together. Do this repeatedly until you're left with a single digit, which will never be zero (e.g., 1 through 9 are themselves; 10 would be 1+0 = 1, etc).
A large example, along with a couple methods
8,675,309 would be 8+6+7+5+3+9 = 38; then, 3+8 = 11; then, 1+1 = 2.
Another way of doing it without needing a calculator, is by "removing the 9s" -- because anything plus 9 ends up resolving to the same single-digit number: 2+9 = 11, then 1+1 = 2; etc. So with this method, I'd say "drop the last digit; then, the 8 can combine with 1 of the 3 to make a 9 and drop it; and the 7 can combine with the other 2 from the 3, and drop that. Then we're left with a 6 and a 5, which we can do in our head 6+5 = 11, then 1+1 = 2."
Alternately, when you get to the 6 and a 5, you could remove a 9 by taking 3 away from the 5 and discarding it with the 6; then you're left with 2, as well.
Formally, it's: remove any 9s; then, combine any 8s with 1s, and if there aren't 1s, go up to 2s, 3s, etc. Remove all 9s and you're left with a single digit.
My heading contains three "1"s! (No, it doesn't, but I'll post this anyway!)
The reason I started this post was because I (thought I) had seen my heading contain three numbers that all added up to "1" via the vortex math technique:
461 -> 4+6+1 = 11 -> 1+1 = 2; 885 -> 8+8+5 = 21 = 2+1 = 3; and 588 => 5+8+8 = same as the middle one, result of 3.
So I wrote all the above thinking that my heading had three numbers that added up to 1, but I was completely wrong; they add up to 2, 3, and 3. Doh! :) I'm posting this anyway, as I wrote a lot and am also including follow-up learning.
Anyway, you can learn more by reading and following the links from here: http://vbm.isteaching.com/
One really neat correlation I noticed: the image they use for the doubling circuit/3-6-9 circuit (it's at the above link, just below the video "Randy's Donuts"), is very similar to the Freemason's logo! Their logo consists of a compass and a square. The compass is the 3-6-9 circuit, and to make the square you just need to extend the lines from points 2 to 4, and points 7 to 5, until they intersect. I made my own version of it to avoid copyright issues:
And here's a free Freemason's logo image:
(From http://freemasonry.bcy.ca/graphics.html found via http://www.masonic-lodge-of-education.com/masonic-clip-art.html.)
I haven't read about anybody else making the connection between the Freemason's logo and the diagram -- although, to be clear, I'm not saying nobody else has noticed it, just that I happened to notice it independently. I'd be interested to hear of anybody else who did. Enjoy!