1. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

2. Who invented Safety Pin ?

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

3. Who invented by Electric Lamp ?

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

4. Who invented Calculus ?

Answer: Newton of Britain in 1670.

5. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

6. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

7. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.