Fold a paper and reach to the moon!
If you have a piece of paper that is 0.1mm thick, how many times you will have to fold it into half in order for it to become tall enough to reach the moon?
Note
The Distance between earth and moon is 3,84,400 km
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1 solution
Each fold doubles the thickness of the paper. So, as a multiple of the first sheet, the thickness grows according to the doubling sequence: after 2 folds, it is 2mm thick, after 10 folds, it is just over 10 cm thick and after 42 folds it is 439,804 km thick - tall enough to reach the moon.