Inventions Practice Tests
Inventions Online Tests
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The MCQ: In which one of the following year, Jigsaw puzzles were patented; "Jigsaw Puzzles" App Download (Free) with answers 1755, 1785, 1767 and 1725 for online school courses. Solve inventions and inventors quiz questions, download Google eBook (Free Sample) for online teaching certification programs.
MCQ 1: In which one of the following year, Jigsaw puzzles were patented?
MCQ 2: Jigsaw Puzzles was invented by
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