Question: a boy named david saw a chiken crossing a track. the chiken never made it to the other side and was found squashed.{no cars came on the track} how is this?
Question: Four men are trying to cross a small bridge. They can each individually cross it in 1, 2, 5, and 10 minutes respectively. To cross, they must carry a lantern to light the way, and at most two can cross at the same time (when two people cross it takes the longer time for both of them). Can they all get across in 17 minutes? (Remember they have to bring the lantern back for the other people to use!)
Answer: Yes, it is possible in 17 minutes. Here is how it works:
1 2 5 10 ---- _ _ _ __ total = 0
_ _ 5 10 ---- 1 2 _ __ total = 2
1 _ 5 10 ---- _ 2 _ __ total = 3
1 _ _ __ ---- _ 2 5 10 total = 13
1 2 _ __ ---- _ _ 5 10 total = 15
_ _ _ __ ---- 1 2 5 10 total = 17.