What would you do if you found Leonardo da Vinci’s secret vault that is locked and secured by a series of combination locks? There are three codes by the door: the first one reads “1210”, the second one reads “3211000” and the third one… it appears to be missing!
Can you figure out the third number that will open the door? Watch the video; it will reveal the logic behind the numbers and help you get to the solution. Have fun!
