How many petals ard the rose?

I sloved it!!!

For those ppl who wanna challenge urself... here is the game

http://crux.baker.edu/cdavis09/roses.html

I feel damn great to solve this coz i took like erm... better not say the time la..
But according to the professor, the smarter u are the longer u will take to solve it!
so i think i am pretty smart ba ..haha but i am sure u will feel pretty stupid when u solve this.
keke, at first i even tot there are NO answers to it or it may be a prank but in fact it is not!