- Locked iPad, Jeff. I love that math makes large, incomprehensible numbers a little more comprehensible. How many days, weeks, or years will I have to wait to try another passcode?
- Bake House Piano Drop 2012, Jeffrey Kirby. They really only had one shot at this. No do-overs. So how did they calculate the position of the ground piano for impact with the flying piano?
- When you wish upon a star …, Statler Hilton. I want to see what this looked like from the air. This had to be carefully laid-out and diagrammed.
- Giant Domino, Ian Frame. A gaggle of these popped up after my NCTM talk yesterday (during which I plugged 101questions). These enormous objects litter a small acreage surrounding the Philadelphia convention center, inspiring a pile of interesting questions related to scale. “How tall is the person who is playing with this domino?” will get you first-order similarity. “How heavy is he?” gets you the third order.
- File Cabinet — Act 1, Andrew Stadel. Crazy bananas. Thankfully, only one of us has to do this for all of us to use it and, lucky for him, he only has to do it once.
- Floor 13 please, Luke Walsh. I had a back-and-forth with Karim Ani over this first act. As of this writing, all four of Luke Walsh’s “students” want to know how heavy the average person is. Meanwhile, Walsh asks his students, “What is the area in square feet of this elevator?” That difference interests me. It seems, perhaps, typical of the student-teacher relationship where I can always override my students’ preference by the power vested in me as a teacher, a grown-up, and a person who is several feet taller than they are. All other characteristics of a task being equal, though, I’d rather its question be something that occurs naturally to them or that seems natural when I pose it. 101questions helps me locate those natural-seeming questions.
Plus my own listing:
- Portal Laser. I uh got kinda heavy into Portal this last week. Both of them.