Statistics for Longest reigning world leaders

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Rank	Rule	Reign	Answer	% Correct
Longest ruling non-royal leader	Maximum leader of Cuba	52 years	Fidel Castro	93%
Longest reigning British monarch		64 years	Elizabeth II	86%
Longest serving US president		4,422 days	Franklin D. Roosevelt	71%
Longest ruling non-royal leader currently ruling	President of Cameroon	40 years	Paul Biya	29%
Longest reigning monarch currently reigning	King of Thailand	69 years	Bhumibol Adulyadej	21%
Candidate for the longest reigning leader of all time	Pharaoh of Ancient Egypt	94 years	Pepi II Neferkare	14%
Longest reigning sultan of the Ottoman empire		46 years	Suleiman the Magnificent	14%
Longest reigning pope		31 years	Pius IX	7%
Longest serving British prime minister		20 years	Sir Robert Walpole	7%
Longest reigning Roman Emperor		48 years	Theodosius II	7%
Longest reigning Chinese emperor	Qing dynasty	61 years	Kangxi	0%
Longest verifiable reigning monarch	King of Swaziland	82 years	Sobhuza II	0%
Longest reigning Malietoa of Samoa		45 years	Tanumafili II	0%