**Cross The Desert Logical Riddle - 24 October**

Mr. Rawat wishes to cross a the Sahara desert.

It requires 6 days to cross.

One man can only carry enough food and water for 4 days.

What is the fewest number of other men required to help carry enough food for Mr. Rawat to cross ?

**For Solution :**Click Here

He needs two additional men

ReplyDeleteall start with 4 days of food

at the end of day one all of the men have used up one of their supply days. one of the men gives one of his supplies to each of the other two and travels safely home with the one he is left with. at the end of day two the first man is back at home and the others are left with three days of supplies again. This time the man gives one day of supplies to mr rawat and uses the remaining two to get home. Mr rawat now has 3 days of trip and 3 days of supplies so he can safely cross

GCD(4,6)

ReplyDeleteMr.Rawatv and two persons starts journey to cross the sahara , each one have food for 4days,

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after first day,every one consumed 1 day food, then the first person among them give to Mr.rawat and another person his food for one day, and the first person return back... so first person use his 4days food...like...1day travel and 1day return back + gave 1 day food to Mr.Rawat and to another person......,

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now Mr.Rawat and another person contain for 4days food....now..

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after travelling another day...

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the second person gives 2 days food to Mr.Rawat ... and then he also return to Back....with his remain 2 days food..which is used to return back for 2 days....

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Now Mr.Rawat contain 4 days food...so..he will cross the sahara..remaining 4 days .with.food

One man (and a gun). At the second day, Mr. Rawat shot the man, and took the 2 days supply for him to continue the journey.

ReplyDeleteone man and a supply horse that carries 2 day supply

ReplyDeleteor

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ZERO is "The fewest number of other men required to help". I'm very surprised that in 1 1/2 years no one else has gotten the correct answer. Mr. Rawat alone can carry food out into the desert and leave it, then return home for more food, then go out further and leave it, etc., until he has enough stored to complete the journey. Each day, he leaves home with 4 days' worth. He starts the ordeal by taking 2 days' worth of food out to the 1/6th point and returns home, since he uses 1 day's worth to get there and 1 to get back. Next, he does the same thing, now having 4 days' worth stored there. On the next trip out, he ends with 7 days' worth there, since he doesn't return home again. Then he uses 4 of the 7 to store 2 at the 2/6th point and return to the 1/6th point, where he had left 3. Lastly, he takes those to the 2/6th point, giving him the 4 he needs to go 4 days to finish the desert crossing.

ReplyDeleteWhat about if it takes nine days to cross the dessert and another nine days to go back. You can only have 12 days of food supply each. The maximum is 2 men

ReplyDelete