In details

Challenge 55


The bridge

Difficulty level:

4 friends must cross a flimsy wooden bridge at night, and it is essential to use a flashlight to cross. The bridge can only support the weight of 2 people and friends have only one flashlight. Camila it takes 8 minutes to cross, Manolito it takes 4 minutes, Carlos takes 2 and Romerito 1 minute. What should they do to cross to the other side, the 4, taking only 15 minutes?