Individual problems are assigned ratings based on difficulty. There are several reasons for this difficulty. Both are seen in terms of some difficulty or barrier that is encountered. This supplied a mathematical explanation for the apparent computational difficulty of finding optimal tours. The person is free to choose among several possible options of task difficulty. The scale consisted of thirty tasks of increasing difficulty. Fitness approximation is one of the solutions to overcome this difficulty. Players moved through 15 levels of obstacles available in three difficulty levels. These include, but are not limited to, anxiety, arousal, task difficulty, and skills. These circumstances contributed to the increasing difficulty of governing the Philippines. This is done in cases of unusual difficulty or importance. The Career Mode is played as a series of levels of increasing difficulty. They were put down with great difficulty and considerable savagery. Dysphagia (difficulty swallowing, solids worse than liquids) and painful swallowing are common initial symptoms. It may begin with difficulty naming things.