Has anyone done this before? I did and it took me about 30 - 45 minutes to work out. Some people say the better you are at maths the harder it is to work out. Anyway here is an online version I found, tell us if you solve it but remember not to give it away.
http://www.freeworldgroup.com/games/roses/
Good luck.
http://www.freeworldgroup.com/games/roses/
Good luck.