☎️ Call up your friends! Solve set 63 is here! ☎️

Happy birthday to Alexander Graham Bell – known for inventing the telephone! Bell was an innovative scientist and inventor. We are inspired by his curiosity and wanted to create fun math puzzles in honor of him!

Check out Problem 1 – related to the sounds telephones make when you press a key on the dialing pad!

Can you figure out the minimum number of frequencies to designed an alternative system  described in the problem?

Solve set 63: Alexander Graham Bell // WTF? What’s the Frequency?