You have 5 small chains with 4 links.(Question continue below)?

Question

If it costs 10 cents to open a link and 10 cents to close a link, how would form a circular chain with only 80 cents ?

Answer 1

take one chain completely apart (40 cents)

use those 4 links to join the other 4 chains (40 cents)

Answer 2

throw away 1 chain

Answer 3

You would open 1 link on each chain to link it to the other, then close it (4 links total 4 *.20)) for a total of $0.80.

Once the chains are all connected, form a circle