# Thread: Math turns brains to mush.

1. ## Math turns brains to mush.

I woke up just to post this, and I don't really expect any response. I just want you to see this weird shit.

1 x 1 = 1
11 x 11 = 121
111 x 111 = 12,321
1,111 x 1,111 = 1,234,321
11,111 x 11,111 = 123,454,321
111,111 x 111,111 = 12,345,654,321
1,111,111 x 1,111,111 = 1,234,567,654,321
11,111,111 x 111,11,111 = 123,456,787,654,321
111,111,111 x 111,111,111 = 12,345,678,987,654,321

My brain is officially dead. Notice how the highest single number in each product also equals exactly the amount of 1s in each part of the problem. Notice how the single numbers go up by one and then back down after hitting the apex number.

What. The. Hell.

I'm sure this has been done before, but I don't care. It's fried my skull into nothing. I don't think I can ever be right again.

That is all.

2. Sure, when you look at it, it makes perfect sense.

When you do the arithmetic via basic multiplication methods (of numbers greater than 10), you can easily see why it works like this.

3. Haha,

That's cool. Although the coolest thing I've seen was a proof that took apart a sphere with a diameter of 1 meter, and then reassembled it to a sphere with a diameter of 2 meter.

I didn't get it either.

4. *Twitches as his brain shuts down*

5. See, aren't numbers beautiful?

6. It's not hard to see if you look at it right.

1111*1111 = 1111*(1000 + 100 + 10 + 1) =

Code:
```1111000
111100
11110
+  1111
--------
1234321```
You basically just slide the number across and add it again, so the result isn't very surprising . It is kind of a neat pattern, though.

[EDIT]
Now I will blow your mind by saying that 1111 * 2222 = 2468642. It counts by twos ;-).

7. *yawns*

1 + 1 = 10

that is all...

8. Darkfin: there are only 10 kinds of people in this world.

9. Those who understand binary... and those that don't LOL.

10. Hmm... this thread reminds me of something I saw once about the number 142857... watch this:

1 × 142857 = 142857
2 × 142857 = 285714
3 × 142857 = 428571
4 × 142857 = 571428
5 × 142857 = 714285
6 × 142857 = 857142

See the pattern? Each time it's the same digits, in the same order, just rotated round. It's what's called a cyclic number.

And the coolness doesn't stop there:

7 × 142857 = 999999

One digit off one million! And then the pattern continues:

142857 x 8 = 1142856
142857 x 9 = 1285713
142857 x 10 = 1428570
142857 x 11 = 1571427

Don't see it? Add the first number to the last number. For example, with 1142856, 1 + 6 = 7, and stick that on the end to get 142857! And then it carries on like this, until you get to another multiple of 7:

142857 x 14 = 1999998

2 off 2 million!

There's so much more I could say about it: I've got loads of webpages open and I'm learning more and more about it. But I've gone on for long enough now, so if you wanna find more about this awesome number, stick it into google some time!

One last cool thing:

142 + 857 = 999

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