1. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

2. Who invented Super Computer ?

Answer:

Seymour Cray

3. Who invented Calculus ?

Answer: Newton of Britain in 1670.

4. Who invented Diesel Engine ?

Answer: Rudoff Diesel of Germany in 1895

5. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

6. Who invented paper ?

Answer:

Cai Lun

7. Who invented Safety Pin ?

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