About Inventions and Inventors Quiz #840
Inventions and Inventors Quiz #840 was the quiz for Tuesday, October 20, 2026: 10 questions: 2 easy, 4 medium and 4 hard. Everyone who played Inventions and Inventors Quiz that day got the same quiz, and it stays here to play for 60 days.
The questions of Inventions and Inventors Quiz #840
- Which of these is credited to Alfred Nobel?
- Which of these is credited to Alexander Graham Bell?
- Who is credited with creating the first vaccine?
- Who is credited with greatly improving the steam engine with a separate condenser?
- How long did the Wright brothers' first powered flight last?
- What building material did the Romans use that helped domes like the Pantheon survive?
- Which device made it possible to find longitude at sea, thanks to John Harrison?
- Who is credited with inventing the windshield wiper?
- Who is credited with inventing the pendulum clock?
- Who is credited with building the first steam locomotive to run on rails?
The answer options and the answers appear only when you play the quiz, one question at a time.
New to Inventions and Inventors Quiz? The rules, tips and common questions are on the Inventions and Inventors Quiz page.
Other days of Inventions and Inventors Quiz
- Inventions and Inventors Quiz #843, Oct 23
- Inventions and Inventors Quiz #842, Oct 22
- Inventions and Inventors Quiz #841, Oct 21
- Inventions and Inventors Quiz #839, Oct 19
- Inventions and Inventors Quiz #838, Oct 18
- Inventions and Inventors Quiz #837, Oct 17
- Today’s quiz, #851
Every day of the last 60 is in the puzzle archive.