An intelligence quotient (IQ) is a total score derived from several standardized tests designed to assess human intelligence. The abbreviation IQ was coined by the psychologist William Sterne for the German term Intelligenzquotient, his term for a scoring method for intelligence tests at University of Breslau he advocated in a 1912 book.
Answer: Ronald Reagan became the oldest president when he was elected in 1980 at the age of 69.
Ronald Reagan (38th President) was the oldest serving president to date. At his first inauguration (in 1981) he was 69, and he was 73 when he was sworn in the second time (in 1985). He was the oldest president in office, being 77 his last year and leaving office just 16 days before his 78th birthday.