Phil can cross the bridge in 1
minute.
Karen can cross in 2 minutes.
Stinky can cross in 5 minutes.
Bubba can cross in 10 minutes.
First, Phil and Karen go across
with the flashlight:
Phil
(flashlight)
>>
Karen >>
(2 minutes are now used up.)
Karen takes the flashlight back
across to the others:
<< Karen
(flashlight)
(4 minutes are now used up.)
Stinky and Bubba go across with
the flashlight:
Stinky
(flashlight)
>>
Bubba >>
(14 minutes are now used up.)
Phil takes the flashlight back to
the other side:
<< Phil
(flashlight)
(15 minutes are now used up.)
Karen and Phil cross for the last
time:
Phil
(flashlight)
>>
Karen >>
(17 minutes are now used up.) |
