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:
World War I started in the year?
The famous Vishnu temple at Angkor Wat in Cambodia was built by
Who invented logarithms?
In which sport did India win Bronze medal at Rio Olympics 2016?