Level1- Electronics Basics

Today's question is based on Series and Parallel combinations of resistors:

Yep, most of you have got it right- 6 Ohms.
However, if you messed up somewhere, or are new to this, here's an explanation that should help-
(click on the image to enlarge)

And then we solve the problem by simplifying the diagram after every step leading to a simpler expression-

Hope the explanation made it clear, if you do have any doubts, the comment box is all yours! 
Do leave a comment if this article helped you understand resistors better :)

Ready for a level2 question?