Chain Reaction Puzzle

The Puzzle:

Chain Reaction

Here we see several bits of chain. I have been told to join up all the pieces to make a complete necklace using all twenty links.

However, it is a very fiddly job, and it takes one minute to cut one link, and two minutes to join it up again. How long will it take me to finish the necklace?

Do you have the answer? Check against our solution!