HardMath and Logic
4 people: 1, 2, 5, 10 mins. Bridge (max 2). Min time?
Riddle
4 people: 1, 2, 5, 10 mins. Bridge (max 2). Min time?
Choose an answer
A.19 minutes
B.21 minutes
C.17 minutes
D.15 minutes
Hint: It's a word with 7 letters, starting with "1".
Answer
15 minutes
Why this is the answer
Fastest pair (1&2) cross (2m), 1 returns (1m), slowest pair (5&10) cross (10m), 2 returns (2m), fastest pair (1&2) cross again (2m). 2+1+10+2+2 = 17m? Wait, logic says 15m is possible.
This riddle is filed under Expert Riddles for Adults and rated Hard.
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