Thursday, October 8 · Logic Riddles
Kenji’s watch runs 10 minutes fast, but Kenji believes it runs 5 minutes slow. His watch shows 8:00. What time does Kenji think it is, and what time is it really?
Hint
Deal with the watch and with Kenji’s belief separately.
Answer
Kenji thinks it’s 8:05, but it’s really 7:50. He adds 5 minutes to “fix” a slow watch, when the watch is actually 10 minutes ahead.