<a href='http://personal.baker.edu/web2/cdavis09/roses.html' target='_blank'>http://personal.baker.edu/web2/cdavis09/roses.html</a>
You have to figure out the pattern and what the answer is for each roll. Some people find the answer right away while others work on it for months without finding it.
Supposedly, more intelligent people can have more problems with it by overthinking it. That must mean why I haven't gotten it yet.

There's a story of Bill Gates in his college days having more problems with it than others in his group -
<a href='http://member.melbpc.org.au/~lborrett/computing/petals-bg.htm' target='_blank'>http://member.melbpc.org.au/~lborrett/comp...g/petals-bg.htm</a>
If you solve it, don't tell others though. Have fun!
Scaryfun.