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.
Quick Answer. Republican President Ronald Reagan was the oldest acting U.S. president; he was 69 years old (just a few days shy of his 70th birthday) when he took office in 1981, and he served two consecutive terms, meaning he was in his 70s for the majority of his tenure as president.