Ok...
I don't quite get how to solve it mathematically...
I just added up the "petals" around the "rose"
It's actually not a test of how mathematically smart you are, it's more of a test of how quick you are to classify a question. If you can visualize situations and transfer and relate them them to other things (form analogies), then you should be able to get the answer rather quickly. Personally, I got it on the second try because I imagined a rose and petals..
Actually, I imagined a lily...
SPOILER!!! DON'T READ UNLESS YOU WANT TO FIGURE IT OUT ON YOUR OWN!!!
Basically, the 'rose' is the dot in the center and the 'petals' are all the dots around it.
So.. Roses are the numbers 1, 3, 5 and the petals are 0, 2 and 4 respectively. So.. just add up the number of petals and that's it.
Moral to the story: think outside the box. Even if someone says it's a math, science or whatever type of question, look at it from another approach for clarity and greater understanding.