Suppose we have coins with the following denominations: 5 cents, 4 cents, 3 cents, and 1 cent, and that we need to determine the minimum number of coins to create the amount of 7 cents. In order to solve this problem we can use a technique called "Heuristics". Webster1 defines the term Heuristic as "involving or serving as an aid to learning, discovery, or problem-solving by experimental and especially trial and error methods". In practice, this means that whenever problems get too complex to find the guaranteed best possible solution using exact methods, Heuristics serves to employ a practical method for finding a solution that is not guaranteed to be optimal, but one that is sufficient for the immediate goals. For some problems, tailored heuristics can be designed that exploits the structure within the problem.