The bridge crossing
Four people must cross a bridge at night with a single flashlight. At most two cross at once, and a pair moves at the slower person's pace. Their individual times are 1, 2, 5, and 10 minutes. What is the minimum total time (in minutes) for all four to reach the far side?
Show hints (2)+
- Pair the two slowest so 10 and 5 'overlap'.
- Use the two fastest as ferriers of the flashlight.
Answer
Reveal answer →Final answer
17
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Asked at: Game-Based Aptitude, EV & Betting Games