1. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

2. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

3. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

4. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

5. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

6. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

7. Who invented Submarine ?

Answer:

John Philip Holland