Num lock. The Num Lock key exists because earlier 84-key IBM PC keyboards did not have cursor control or arrows separate from the numeric keypad. Most earlier computer keyboards had separate number keys and cursor control keys; however, to reduce cost, IBM chose to combine the two in their early PC keyboards.
The most common rule. The most common and frequently used rule for writing numbers in APA style is determined by whether the number is under 10. All those numbers should be written out in word form, such as four or seven. A number 10 and above is written as a numeral, such as 10, 17, 233.
The default number format. The default number format will be 0th. This takes care of rule 3 above, i.e., if neither rule 1 nor rule 2 apply to the number, it will have the suffix th.. The conditional format for rule 1. Select the cell (or cells) containing the ordinal numbers. In the example I used, I had numbers as shown below.