In the novel, Charles is suffering from a problem named Phenylketonuria where his IQ level is of a person who is aged 70.
Explanation:
The novel Flowers for Algernon talks about a mental illness that one of the main characters of the novel is suffering from. The mental illness that Charlie Gordon is suffering from in the novel is Phenylketonuria. Because of this mental illness, the intelligent quotient of the person is of a person who is around seventy years old.
In the novel, the good point is that he gets treated and his problem is solved. As a result of this solution he becomes intelligent and genius with in a short period of time.
