1. Who invented Hydrogen bomb ?

Answer:

Edward Teller

2. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

3. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

4. Who invented Printing Press ?

Answer:

Johannes Gutenberg

5. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

6. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.

7. Who invented Computer ?

Answer:

Charles Babbage