The Ad-O-Master Jr., The Magic Calculator, made by the Mystoplane Company in 1941.
This is episode 56 of my video series about old calculating devices.
Scan of the quiz book:
https://archive.org/details/adomasterquizbook
End song inspired by "Hotter than a Molotov" by The Coup.
#mystoplane #adomaster
Chris Staecker webarea: https://faculty.fairfield.edu/cstaecker
Mystoplane photo from Henry Ford Museum
Mystoscope images from https://www.worthpoint.com/worthopedia/vintage-mystoscope-mystoplane-co-ny-458372625
Stupid "Stumped the internet" problem is here:
https://www.considerable.com/life/education/viral-math-problem-stumped-internet/