A goldsmith was given a chain to be repaired. The chain was
torn into five equal sections of three links each.
The goldsmith began to wonder how many links he would have
to open up and then solder. After some thinking he decided that it would be
four.
What do you think? Could he have done this job with opening
up a fewer links and then soldered?
Answer: This job
can be done simply by opening up only three links – the links of one section,
and joining the ends of the other four sections with them.
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