1. Who invented Calculus ?

Answer: Newton of Britain in 1670.

2. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

3. Who invented paper ?

Answer:

Cai Lun

4. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

5. Who invented Safety razor ?

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

6. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

7. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm