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.
The oldest president to be elected to office was Ronald Reagan, who was 69 when he took office in 1981. Some more interesting facts about the ages of US presidents: The oldest elected president was Reagan (age 69); the youngest was Kennedy (age 43).