Inventions MCQs (Grade 8) From Textbook
Free Inventions MCQ App | Laser e-Book PDF Download
Inventions MCQs – Mock Test 174
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The MCQ: In which one of following year first laser was discovered; "Inventions MCQ" App (Android, iOS) with answers: 1940, 1950, 1960, and 1930 for online school and college. Practice inventions and inventors questions and answers, Apple Book to download free chapter for online degree programs.
In which one of the following year the first laser was discovered?
In which one of the following year, internal combustion engine was discovered?
Penicillin was discovered by
Patented food bar was designed to help burn fat by a pathologist in California named as
In which century, Pascaline calculator was patented?
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