Teachers in Tennessee proved that technology can be used for good with a touching video that’s going viral for all the right reasons. “Graduates from McCallie School, […] ...

Five seniors from McCallie School in Tennessee responded to questions from their younger selves, which ranged from favorite subjects to future plans, in a now-viral video.

Can you solve the answer to the simple math equation? Read on below to see the answer revealed and how to get there.