In order to go to a certain place 10 km from here, I'm going to move forward as follows :
First time, I move 5 km.
Second time I move 2.5 km of the half of 5 km.
Third time I move 1.25 km of half of 2.5 km. --------
When I move forward like above, how many times does it it take to reach the goal ?
Answer
Can not reach
Solution
In case of the method of this progress, there certainly remain the half distance from the place where I finish walking along to the goal.
Therefore I can not reach there.
