Who is the oldest man to serve as president of the United States?

Who is the oldest man to serve as president of the United States?

• A. George Washington
• B. Dwight D. Eisenhower
• C. Franklin D. Roosevelt
• D. Ronald Reagan

Answer: (D)

The key idea is to compare ages while the person is serving in the presidency. The oldest occupant is measured by how old they are during their time in office, not just by their birth year. Joe Biden was 78 years old when he was inaugurated in 2021, and he has remained in his 80s while in office, making him older than Ronald Reagan, who was 69 at his inauguration in 1981 and 77 at the end of his presidency in 1989. Reagan did hold the record for the oldest president before Biden, but Biden surpassed him and is, to date, the oldest person to have served as president.

The key idea is to compare ages while the person is serving in the presidency. The oldest occupant is measured by how old they are during their time in office, not just by their birth year. Joe Biden was 78 years old when he was inaugurated in 2021, and he has remained in his 80s while in office, making him older than Ronald Reagan, who was 69 at his inauguration in 1981 and 77 at the end of his presidency in 1989. Reagan did hold the record for the oldest president before Biden, but Biden surpassed him and is, to date, the oldest person to have served as president.