This article presents a brief biography of Paul Erdos, who focused on problem-solving, particularly in the areas of number theory, combinatorics and graph theory. During his life he had no property, no family and no fixed address. He buttered his first piece of bread at age 21. He never cooked, nor ever drove a car. Another mathematician, Ron Graham, took care of his daily financial accounting. Erdos'approach to mathematics was as unique as his life. He invented a new kind of art: the art of raising problems. He said that mathematics is eternal because it has an infinity of problems; and in his view, the more elementary a problem is, the better. He loved areas of mathematics which did not require an excessive amount of technical knowledge but give scope for ingenuity and surprise.