User:Franklin/Problem of the Week

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Feel Free to Post your answer.

At the end of the Week the one with the better answer Gains the right to Post his/her own Problem of the Week.


Definition: The week ends on Friday!


Please, do not post too difficult problems. Remember that the problems are supposed to be solved in a week.



In the Torus, the surphace of a Donnut, draw the two generating circles. What is the result of shrinking these two circles onto a single point? Regard the torus as rubber-made tube.