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Desert crossing puzzle: the minimum fuel problem

Mark Frauenfelder
Sep 17, 2025
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More Problematical Recreations, published by Litton Industries

A puzzle from More Problematic Recreations, published by Litton Industries in the early 1960s:

A truck, when fully loaded, can carry enough fuel to take it half-way across a barren desert. If the truck can return to its starting point as often as is necessary, what is the minimum amount of fue…

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