Statistics for Youngest and Oldest U.S. Presidents

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Ranking	Age	President	% Correct
Youngest	43	John F. Kennedy	100%
Oldest	78	Joe Biden	96%
Oldest	70	Donald Trump	95%
Oldest	69	Ronald Reagan	90%
Youngest	42	Theodore Roosevelt	90%
Youngest	47	Barack Obama	88%
Youngest	46	Bill Clinton	88%
Oldest	64	George H.W. Bush	87%
Oldest	61	John Adams	87%
Oldest	68	William Henry Harrison	76%
Oldest	61	Andrew Jackson	75%
Oldest	62	Dwight D. Eisenhower	73%
Youngest	46	Ulysses S. Grant	73%
Youngest	49	James K. Polk	70%
Oldest	65	James Buchanan	67%
Youngest	49	James Garfield	67%
Oldest	64	Zachary Taylor	63%
Youngest	47	Grover Cleveland	62%
Youngest	48	Franklin Pierce	60%
Youngest	50	Millard Fillmore	54%