Who invented Space Pen?
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Who invented the contact lens?
In April 2017, who has been made United Nation's Messenger of Peace?
In which sport in Asian Games, India has won maximum Gold Medals?
In the following question, select the related number from the given alternatives. 47 : 57 : : 93 : ?
A solid sphere of diameter 17.5 cm is cut into two equal halves. What will be the increase (in cm2) in the total surface area?
Who discovered Electron?
Who was the founder of the Theosophical Society?