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 second oldest president at the time of his inauguration was William Henry Harrison, who was 68 years of age. However, had Senator John McCain been elected president, he would have been the oldest president to be inaugurated at the age of 72 years old.