Which code includes a letter in its code?

Which code includes a letter in its code?

• A. 31
• B. 32
• C. 31I
• D. 33H

Answer: (C)

This tests recognizing when a code uses letters in addition to digits versus codes that are purely numeric. A code that includes a letter is alphanumeric. The code 31I clearly has a letter after the numbers, so it satisfies the requirement of containing a letter in the code. The other numeric codes have no letters at all, which is why they do not meet the criterion. Note that another option, 33H, also includes a letter, so more than one choice could fit the same rule in practice. The key takeaway is that the presence of a letter indicates an alphanumeric code, as shown by 31I.

This tests recognizing when a code uses letters in addition to digits versus codes that are purely numeric. A code that includes a letter is alphanumeric.

The code 31I clearly has a letter after the numbers, so it satisfies the requirement of containing a letter in the code. The other numeric codes have no letters at all, which is why they do not meet the criterion. Note that another option, 33H, also includes a letter, so more than one choice could fit the same rule in practice. The key takeaway is that the presence of a letter indicates an alphanumeric code, as shown by 31I.