They were finals, not ordinary tests or midterms. Junior and senior year, I think one was Chemical Engineering, but I can't remember the exact name or number.
replyThis year 6.7800 has a both 3h midterm and a 3h final, for instance. Wish us luck.
replyThat would be this?
replyhttps://web.mit.edu/6.7800/www/info24.pdf
Or at least this year's version? If so, it looks like Course 6 hasn't gotten any easier over the years. Good luck!