Two clocks are set correctly at 1 0'clock in the afternoon

Two clocks are set correctly at 1 0'clock in the afternoon. One keeps correct time. The other gains 5 seconds per minute. That evening, when the fast clock shows 6:20, what does the correct clock show?

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #57784