@ValaAfshar It’s actually a masterpiece in misinformation. The whole video is actually a hoax and there is a frame by frame analysis that shows how the illusion was created. Nothing to do with engineering, and a lot to do with social media hype and fakes :) RIT doesn’t have such a stair!
@Clagett Someone clearly has not been to either Mexico City or São Paulo where there is even a congestion of helicopter traffic above and beyond vehicle traffic…
@EvanKirstel It can be either 3 or 7 because the opposite numbers’ absolute difference is always 2. But to balance the half circles to 20, the missing number must actually be 3. So it all depends on context :)
@fermatslibrary If the barber is gender-neutral and does not identify as a man, hence anyone can shave the barber. It all depends on the definition of barber, which is not included in the statement.