Riddles presentation

Dear students, we want to suggest you a new activity: riddles! We'll post one riddle each month. On the right part of the blog you'll see the link. Click on the picture, read the riddle and try to solve it. Then, tell the workshop teacher the answer when you are sure. The ones who solve the riddle will be posted here at the end of the month. The answer will be published as well. Hope you enjoy. Good luck!