<p><a href="http://www.bored.com/mysticalball/index.htm%5B/url%5D">http://www.bored.com/mysticalball/index.htm</a></p>
<p>edit: BTW, the reason why this works is really simple, but let's see if you guys can figure it out.</p>
<p>That's pretty cool, but it's easy to figure out. You get the same picture for any two-digit number. They just change the picture that's used each time.</p>
<p>How does it work?</p>
<ol>
<li>9+9=18. 99-18=81.</li>
<li>9+8=17. 98-17=81.</li>
<li><p>9+7=16. 97-16=81.</p></li>
<li><p>8+1=9. 81-9=72.</p></li>
<li><p>8+0=8. 80-8=72.</p></li>
</ol>
<p>Numbers 81, 72, 63, 54, 45, 36, 27, 18, 9, and 0 have the same picture, so you get the same answer no matter what.</p>
<p>Wait...how does this work?</p>
<p>I'm trying to use the scientific method. When I only think of a number and don't use any process, it usually gets it wrong.</p>
<p>Oh, now I get it!</p>