What is the duration (in minutes) of one-half of a football match?
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Who developed the theory of relativity?
Who discovered electricity and invented the lightning rod and bifocals?
Sewing machine was invented by
In which of the following areas, Pandit Jasraj has established his reputation?
The Asiatic Society was established in Calcutta by
____ are the most intelligent mammals on earth.
When is the World Energy Conservation Day celebrated?