43% now. And don't forget that is including those people that read the comments to find answers... which always surprises me how many people do that (and admit to it, which means the amount that actually does it is even higher!!)
Doesn't include oceans. Also, why is that the people who are talking ocean routes just list the Panama Canal? If ocean routes were allowed, you could also skip the Panama Canal and round South America. Or take the Arctic Ocean...Personally I'd just sail east and take the Suez route :)
Number 6 is worded strangely. I thought you meant "that it was possible to drive through a single state in order to get from Missouri to Colorado" rather than the "Is there only 1 state you can drive through to go from Missouri to Colorado?" that you meant.
Got 100%, the Minnesota vs Alaska temperature one almost tripped me up though, that's one of those classic Jetpunk "seems just believable enough to maybe be true" questions.
Admitingly the ship question stumped me because the first thing I thought of was traveling via Panama Canal. However, with the way the question is worded it implies the ship can do ALL of those things; not just one of those things.
You need to clarify how one could get from New York to LA by ship. Yes it can be done but includes going through other countries. You'd travel south and through the panama canal and into the Pacific traveling north toward L.A. or even further south around Argentina and back north up the coast of South America. If the question only allows us to use the USA for travel, then the answer is no.
"A ship could travel via rivers, lakes, and canals all the way from New York to Los Angeles." The Pacific Ocean is not a river, a lake, or a canal, nor is the Atlantic Ocean.
While a ship couldn't reach LA from NYC without oceans, it could reach Portland, OR: Hudson river, Erie Canal, Great Lakes, Illinois and Michigan Canal, up the Mississippi-Missouri system up to Two Ocean pass and down the Columbia river basin from there (admittedly, it would have to be a very small ship).
Question doesn't say within the borders of the US.