1. Who invented paper ?

Answer:

Cai Lun

2. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

3. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

4. Who invented Computer ?

Answer:

Charles Babbage

5. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

6. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

7. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902