Answer to brain teaser 2

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Brain Teaser 2 Answer

OK - Here is the answer

Bono and Edge cross the bridge - 2 minutes

Bono returns with the light - 1 minute

Larry and Adam cross - 10 minutes

Edge returns with the light - 2 minutes

Bono and Edge cross the bridge - 2 minutes.

Total 17 minutes!!

The second solution is trivial, and involves swapping steps 2 and 4.

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