1. Who invented Calculus ?

Answer: Newton of Britain in 1670.

2. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

3. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

4. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

5. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

6. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

7. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683