In the 21st century tornadoes killed at least 1,637 people. 1,227 of them were in the U.S. It is likely that some deaths in other countries were not documented.
No, there is no hyphen in "twenty-first century." When used as an adjective, it is written as "twenty-first," but when referring to the era as a noun, it is simply "twenty-first century" without a hyphen between "twenty" and "first."
nope, twenty-first century is fine
the twenty first century beginned in 2000 because the twenty first century ends in 2100 actully
Twenty First Century Skinned was created in 1999.
Communication in the twenty-first century is exactly like it is now because this is the twenty-first century. People communicate via email, mail, telephone, cell phone, social media and even television and radio.
Yes. It should be----- Twenty-first Century Skills
Life in the Twenty-First Century was created in 1960.
No. it's not necessary unless it forms part of the proper noun. Examples: The Twenty-first Dynasty of Egypt Twenty-first Amendment
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Twenty first
twenty-first century
The twenty-first century started in the year 2001. As there was no "year 0" the last year of the 20th century (set of 100 years) was 2000.