8 Travelers river crossing puzzle
We have 8 travelers:
– 1 criminal,
– 1 police man,
– 1 mother with her 2 daughters,
– 1 father with his 2 sons (2 different families).
- The mother wants to kill the 2 sons,
- the father wants to kill the 2 daughters
- The criminal wants to kill everybody
- The criminal can’t kill anybody if the police man is present.
- The mother can’t kill the sons if the father is present,
- the father can’t kill the daughters if the mother is present.
- The police man will not prevent the mother or the father from killing any of the children.
All eight travelers arrive at a river at the same time. They want to get across. However, there is only one boat, which can take maximal two people. The boat can only be navigated by an adult.
How can you get all eight people across the river, without anybody getting killed?
The criminal can’t kill anybody if the police man is present.
Why?
He can kill the policeman and then every others.
But that’s not possible only because he can’t kill the policeman.
Moreover, the policeman is always present with himself.
So it’s clear the criminal won’t kill the policeman!!!
1st trip: Police,Criminal will cross……………..Police will return
2st trip: Police,1st Son will cross……………..Police and Criminal will return
3st trip: Father,2nd Son will cross……………..Father will return
4st trip: Father,Mother will cross……………..Mother will return
5st trip: Police,Criminal will cross……………..Father will return
6st trip: Father,Mother will cross……………..Mother will return
7st trip: Mother,1st Daughter will cross…………….Police and Criminal will return
8st trip: Police,2nd Daughter will cross……………..Police will return
9st trip: Police,Criminal will cross……………..Nobody will return
So, by this way everybody will cross the river!!!
“How can you get all eight people across the river, without anybody getting killed?”
So only we need to ensure that they will cross the river. Its not necessary that the process must be optimal though it’s already optimal,I guess .:)
This won’t work as per requirement, because, at Step 3, father is gone, leaving one son whom the mother can kill (because, as per the puzzle, the woman wants to kills the sons).
both are gone read it properly this is also a good solution ..man please don’t comment without. Thinking
Updated! Now I think u will have no problem to understand what’s going on!!
#Viji_Pinarayi
father will take one daughter across. then come back then he will take one son across and come back .then he will take mother across.then he will return and police man will go across with criminal.mother will return with the boat.father will take daughter accross across.and return.then father will take mother across .then police will take criminal back to the shore they started with and will get across with son
then he will return and take criminal away with him
No!!
If the father and daughter cross the river together , the father will kill the daughter!!
So your solution is wrong!!!
Father Cannot be alone with Daughter so he and Daughter cannot cross at same time similarly Mother and son cannot be alone without father
you dont understand that one son of father is with that mother so if he kill daughter then she will kill his son .thats a deal.
if he is protecting his son then he will not kill the daughter
so my solution is right
BESIDES CRIMINAL WANT TO KILL EVERYBODY BUT HE CANT KILL POLICEMAN.SO WHAT ONE WANTS AND WHAT ONE DOES IS DIFFERENT THING ALTOGETHER
“one son of father is with that mother so if he kill daughter then she will kill his son .thats a deal.”
…..
It’s no ‘deal’, because it only endangers the lives of the sons (and the daughter as well). Note that it’s not “one son” but both sons are left behind when he’s taking a daughter across with him. So, in essence, it’s one daughter v/s TWO sons. How’s that a deal, except a losing one?
Don’t you understand that mother want to save her daughter .it does not mean that she will be okay with one of them killed when she can save both by not killing any of son.saving her childeren would be the first priority then killing .one cannot always say 1 is less important than 2 .it depends on the content of deal too.please take a minute before posting any. Objection
1.Policeman and Criminal goes
2.Policeman returns
3.Policeman and Son1 Goes.
4.Policeman and Criminal Returns.
5.Father and Son2 Goes.
6.Father Returns
7.Father and Mother Goes.
8.Mother returns.
9.Policeman and criminal Goes.
10.Father Returns.
11.Father and Mother Goes.
12.Mother Returns.
13.Mother and Daughter1 Goes.
14.Policeman and Criminal Returns
15.Policeman and Daughter2 Goes.
16.Policeman Returns
17.Policeman and Criminal Goes
“The criminal wants to kill everybody”
So how the criminal ,and the police will cross the river together.
He could kill the police!!!
according to question The criminal can’t kill anybody if the police man is present and he cannot kill policeman
Your Answer
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