A blacksmith, a chain and seven days of work: the most elegant solution is not always the most obvious.
The seven links
Riddle statement
A blacksmith agrees to pay a laborer with a small gold chain made up of 7 closed links.
The deal is this: for 7 days, he must deliver exactly one gold link per day.
You can take back links already delivered to make change, but you want to make as few cuts as possible in the chain.
How many cuts do you need at least?