A three-year-old boy who can count to 200 and name every country in the world has become one of the youngest members of Mensa. Tests revealed that Sherwyn Sarabi, from Barnsley, Yorkshire, has an IQ of 136. Sherwyn, who has a reading age of six, began speaking at the age of 10 months and was talking in sentences at 20 months. By the age of two, Sherwyn, left, could read, count to 200, recognise and name countries, flags, planets in the solar system, parts of the body and internal organs. His mother Amanda Sarabi, 36, a former teacher, said he could explain the function of each internal organ. She said: ''It's not like talking to a three-year-old. He doesn't even watch children's programs, he watches the news.''