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XXI is the Roman Numeral for 21 and would be used on a clock using the 24 hour, or military, time system where 000 (or zero hundred) hours is midnight, 1200 (twelve hundred) hours is 12:00 noon, and 2400 (twenty four hundred) hours is midnight again. This system avoids confusion as to which time of day is being referred to...which could be catastrophic in a military situation.
21 or XXI on the clock would refer to 2100 hours which is 9:00PM by conventional time.
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∙ 14y ago
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What does the o in o clock stand for?
"Of the" or "on the"
Roman numeral XXI?
XXI = 21
What do the roman numerals XXI stand for?
21. X=10 X= 10 (10+10=20) I=1 therefore 21
What does the bomb sign on a clock stand for?
This may indicate the time of detonation of an explosive device.
What does 12 t on a c stand for?
12 thirty on a clock
What does 2 h of a c stand for?
2 hands of a clock.
What is the o in o clock stand for?
O stands for Oxygen.
What is xxi translated in english?
XXI is the same thing as 21.
When was Freak XXI created?
Freak XXI was created in 1998.
When was Hespèrion XXI created?
Hespèrion XXI was created in 1974.
When was Converxencia XXI created?
Converxencia XXI was created in 2009.
What number does XXI mean?
XXI is the Roman numeral for 21.
