I did this activity with international engineering graduate students in my writing class at Duke University, and it was a hit. I wanted something that would "jolt" them out of their current way of thinking for both my class and their other classes (this was done near the end of a spring semester). The activity only took about 15 minutes, and it followed Thiagi's notes--the students were initially pleased that they figured out the "pattern," and then became frustrated when I introduced additional number sets that did not align with what they thought the pattern should be. We held on to that frustration to talk about assumptions and stereotyping, and I was able to relate that to our current writing task--writing critical responses to STEM news and peer-reviewed journal articles.