How many people will be needed to cross a frozen wasteland?

It takes a person 6 days to cross a frozen wasteland. However 1 person can carry only 4 days supply’s of food and water. How many people are necessary to assure that 1 person will get across and all others will get back?

Answer #1

Surely it’s impossible because they each carry their own food and water for 4 days? Meaning none of them would make it.

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