Can you say how you arrived at that answer? @anyway also commented 10, but me myself got on an other solution. Therefore, I might've made a mistake, so please tell me how you got that answer?

Got it, in the document I made I added "6 Pink rabbits" instead of "3 Pink Rabbits" at the last equation. That brought some complications into the thing. Lemme adjust that.

Redid the thing and reposted it: https://steemit.com/contest/@pizzachain/intelligence-contest-2-win-100-of-the-sbd-free-votes-fixed-version