1. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

2. Who invented Floppy disk ?

Answer: IBM in 1970

3. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

4. Who invented Automatic rifle ?

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

5. Who invented paper ?

Answer:

Cai Lun

6. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.

7. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.