Inventions Quizzes
Inventions Practice Test 13
The e-Book Letter Box Quiz Questions and Answers, letter box MCQ with answers PDF download, test 13 to learn free inventions online courses. Practice Inventions and Inventors trivia questions, letter box Multiple Choice Questions (MCQ) for online college degrees. The Letter Box Quiz App Download: Free learning app for standard time, abdominizer, ceiling fan, revolver, letter box test prep for online school classes.
The Quiz: First letter-box was discovered by; "Letter Box" App Download (Free) with answers sir albert potts, sir jack kilby, sir hans von ohain and alexander fleming for online learning. Solve inventions and inventors questions and answers, Amazon eBook to download free sample for online learning.
MCQ 61: The first letter-box was discovered by
MCQ 62: The Revolver was invented by
MCQ 63: The ceiling fan was invented by an American electrical engineer named as
MCQ 64: Infomercial exercise was invented by a renowned inventor named as
MCQ 65: Standard time was invented by
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