The twenty-eighth JRMF Webinar took place on Saturday, October 10th, 2020 from 11 am until 12:30 pm. This virtual event was organized by Dr. Hector Rosario, Director of Outreach and Festivals of the Julia Robinson Mathematics Festival (JRMF). Participants were divided in several breakout sessions, depending on whether they were kids or adults. Dr. Jeanette Shakalli, Executive Director of FUNDAPROMAT, acted as the moderator in one of the breakout sessions for adults.
On this twenty-eighth Webinar, participants explored the interesting math activity called “Grape Codes” which is used in Festivals all around the world. The game starts with 6 cups labelled 1, 2, 4, 8, 16 and 32. Two grapes in the cup labelled 8, for example, represent the number 2 x 8 = 16. The activity is based on finding grape codes for different numbers using these 6 cups. The number of grapes that can be placed in every cup is later limited to one grape or no grape, introducing the concept of the binary code.