Inventions Practice Tests
Inventions Online Tests
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The MCQ: In which one of the following year, postage stamps were discovered; "Stamps" App Download (Free) with answers 1832, 1874, 1837 and 1896 for online learning. Solve inventions and inventors quiz questions, download Google eBook (Free Sample) for online learning.
MCQ 1: In which one of the following year, postage stamps were discovered?
MCQ 2: Postage Stamps were patented by
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