Inventions MCQs (Grade 8) From Textbook
Pointing Stick MCQ App Download (Free) | Inventions e-Book PDF
Inventions MCQs – Mock Test 18
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The MCQ: In which one of following countries, pointing stick was patented; "Pointing Stick MCQ" App (Android, iOS) with answers: sweden, america, italy, and germany for distance education. Practice inventions and inventors questions and answers, Apple Book to download free chapter for online learning.
In which one of the following countries, pointing stick was patented?
In which one of the following year, half tone engraving was patented?
In which one of the following year, green ink was discovered?
In which one of the following country, Post-It-Note was discovered?
In which one of the following year, adding machine was patented?
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