1. Who invented Ball-Point Pen ?

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

2. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

3. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

4. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

5. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

6. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

7. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.