Thread: How Good Are You At Reasoning?

Originally Posted by Xei

The amount of fuel in your car will go up and down by the same amounts that it went up and down in the test car with the large tank with ample fuel. You start at the stop where the test car had least fuel. When you start there, you have 0 fuel. So the least fuel you will have on your journey will be this amount; 0. Hopefully this now makes it clear that you can make the journey. You collect the fuel at the stop, and the amount never falls lower than 0. If you always have fuel during the journey, there won't be any point at which you stop.

But how do you know that it only hits zero once