Which one is correct:
- The 21st century has witnessed several technological advancements.
- The twenty-first century has witnessed several technological advancements.
Though there’s no documented rule that dictates writing numbers in words, I recommend students to write numbers from one to a hundred in WORDS. Numbers of higher order are difficult and cumbersome to spell. Consequently, you should use numbers.
Prefer “1921” over “One thousand nine hundred twenty one.”
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