Metal ring puzzle----Fantastic five

To compare the two metal ring puzzles which you find in this video, you will find that they are alike "functunally".
One technique of problem solving is to check in our brian(mind) whether we have solved a similar problem. One term is also meaningful here. "Analogy" is among the thinking skill or strategy, which concerns about not only problem solving but also inventions and innovations..
Therefore this is a sample lesson to show such problem solving technique
解難、發明與創造，不時都會用得着「類比」這個思維技巧的。
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[@ForbinKid]

The one on the left I know as the ball and chain, since it came with a string and ball and a round loop of metal.
One of my favourites since it looks so simple but is relatively difficult to do.

[@jlt131]

thanks for the video! I actually needed to get the ring *back on* for the fantastic five puzzle, so watched you do it in reverse...worked well! and your solution is much simpler than the "official" version!! well done, congrats :)

[@kingluke2]

thank you! now I can get back to something productive...

[@hamiro1000]

vlw pelo video

[@Mrkun1994]

you in the best i like you :X