The 4th and 11th links must be broken. This will enable the man to pay his rent each day as follows: (note that by removing the 4th link a chain of 3 links is created; the removal of the 11th link creates a chain 6 and a chain of 12.) For the first and second days, the single links are given to the landlord. On the third day he pays with the chain of 3 and takes back the two single links. On the fourth and fifth day he gives back a single link. On the sixth day he takes back the chain of 3 and the single links and gives the chain of six. By a similar process it can be seen that the man can pay his rent each day through 23 days.