1. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

2. Who invented Vitamin A ?

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

3. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

4. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

5. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

6. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

7. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin