Question

The flight time from Boston to London is 6 hours 20 minutes. I arrive London at 4:05pm. What time did I set off from Boston

Answer 1

Explanation:

4:05pm go back 4hours and it’s 12:05, then go back another 2 hours, 10:05, then go back another 20mins and it’s 9:45am

Answer 2

4:05pm go back 4hours and it’s 12:05, then go back another 2 hours, 10:05, then go back another 20mins and it’s 9:45am

Final Answer: 9:45am