Land covers about ______ of the earth's surface.
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In terms of size, Earth ranks no. ___ in our Solar System.
India's first official census operation was undertaken in which year?
Noor Jahan was the wife of which Mughal emperor?
Who created the first mechanical computer, which proved to be the prototype for future computers?
Who is not amongst the winners of Nobel Prize 2016 for Chemistry?
What is the simplified value of (cos A + sin A)(cot A + tan A)?
If one angle of a triangle is equal to half the sum of the other two equal angles, then the triangle is