alphaforcex

This is one of the question that takes me the longest to solve. I got it solved in 3 days!! And none of my friends/coworkers were able to solve this in a timely manner and without hints (some even needs many of them). The key is, you need to remember the result of each weigh which will be able to exclude certain sets and able to solve it. I need to explain even the answers many times to many people before they understand it. You'll think it's so straightforward if you just read the answer without trying to answer it in the first place.