Question : Which of the following was invented by Sir Humphry Davy?

Option 1: Safety pin

Option 2: Steam engine

Option 3: Safety lamp

Option 4: X-rays

Question : Who invented the jet engine?

Option 1: Karl Benz

Option 2: Sir Frank Whittle

Option 3: Thomas savery

Option 4: Michael Faraday

Question : Postage Meter was invented by

Option 1: Fyodor Pirotsky

Option 2: Arthur Pitney

Option 3: Fritz Pfleumer

Option 4: Stephen Perry

Question : Select the option that expresses the given sentence in passive voice.

The Mesopotamians invented the decimal system.

Option 1: The decimal system was invented by the Mesopotamians.

Option 2: The decimal system is invented by the Mesopotamians.

Option 3: The decimal system is an invention of the Mesopotamians.

Option 4: The decimal system has been invented by the Mesopotamians.

Question : The number system 'Zero' was invented by

Option 1: Ramanujam 

Option 2: Arybhatta 

Option 3: Patanjali 

Option 4: An unknown person