Which of the following letters does not represent the Roman numeral?

Options

A. D
B. N
C. C
D. I

Answer

To solve the question "Which of the following letters does not represent the Roman numeral?" we will analyze each of the given letters: D, N, C, and I.

### Step-by-Step Solution:

1. **Identify the Roman numeral for D**:
- The letter D represents the Roman numeral for 500.
- **Hint**: Remember that Roman numerals have specific values assigned to certain letters.

2. **Identify the Roman numeral for C**:
- The letter C represents the Roman numeral for 100.
- **Hint**: Look for common Roman numeral letters like C, which is often used in various combinations.

3. **Identify the Roman numeral for I**:
- The letter I represents the Roman numeral for 1.
- **Hint**: I is one of the simplest Roman numerals and is used frequently.

4. **Identify the Roman numeral for N**:
- The letter N does not represent any Roman numeral value.
- **Hint**: Check if the letter is included in the standard Roman numeral system (I, V, X, L, C, D, M).

5. **Conclusion**:
- Among the letters D, N, C, and I, the letter N is the only one that does not represent a Roman numeral.
- Therefore, the answer is N.

### Final Answer:
The letter that does not represent a Roman numeral is **N**.