Discovery & Inventions - Online Test

Total Number of Questions in this Test: 10
Total Number of Questions Answered: 0
Total Number of Questions Skipped: 0


Time left:
 
Question : 1

Which of the following persons invented the Magnifying glass?

Options :
  •  Johann Zahn
  •  Roger Bacon
  •  Salvino D'Armati
  •  Hippolyte Marie-Davy