Who invented Vacuum Flask?
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Who invented Rocket?
Pandit Bhimsen Joshi is: ________________
A circle and a square have same area. The ratio of the side of the square to the radius of the circle will be:
The famous Vishnu temple at Angkor Wat in Cambodia was built by
World War I started in the year?
Who invented logarithms?
Which of the following languages has been used by Surdas in his writings?