This was a relatively simple puzzle, and as such I got a lot of answers, many of them within minutes of my posting the puzzle. This one was originally solved by Anisha, my 9 year old, on her birthday. I got correct answers from many first timers including Sid Pareek, Kamal Karmakar, Phillip Gerbert and like many times before, from Tishyaa. Well done!

The boxes can be correctly identified by drawing just one marble from the box labelled BW. For the full answer, please go to:

http://www.educreations.com/lesson/view/solution-to-puzzle-29/10191554/?s=joS5m4&ref=link

Hope you enjoyed the puzzle!