Ok, another easy one, while people ponder my hard one
A large sheet of paper is 0.1mm thick. A man amuses himself by tearing it in half and putting both pieces together, and then tearing those into four sheets, and repeating the process until he has done it twenty-five times.
How high is the stack of paper now?
A) As thick as a book
B) As high as a man
C) As high as a house
D) As high as a mountain