In the publications produced by the Information Services Office, we adopt the following style conventions when it comes to referring to or presenting numbers on the page.
For numbers one to nine, we spell out the whole words. From 10 onwards, we use the Arabic numerals. Illustrations:
Out of the six finalists, only one could win the trophy.
Out of the 35 contestants, only 12 could qualify for the final.
Out of the 20 athletes, only two would be selected for the urine test.
The same logic applies to numbers indicating sequence, e.g.,
First, fifth, ninth, 10th, 28th, 100th, …
Note that the above does not apply in the following situations.
First, if the number appears at the beginning of a sentence, it should always be spelled out as a word, as in:
Twenty-five students attended the consultative committee meeting.
Second, Arabic numerals should be used in tables, percentages, after the $ sign, and in a long list:
CUHK faculty members include 4 Nobel laureates, 1 Fields Medalist, 1 Turing awardee, 28 IEEE fellows, etc.
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