What letter comes in the cell containing the question mark? (fill in the blank question) 
H D A
N J ?
V N M

To determine the missing letter in the sequence, let's examine the pattern formed by the given letters in the 3x3 grid:

```
H D A
N J ?
V N M
```

We'll analyze the pattern by rows, columns, and diagonals to see if there is a discernible logic to the arrangement of letters.

1. **First Column: H, N, V**
2. **Second Column: D, J, N**
3. **Third Column: A, ?, M**

4. **First Row: H, D, A**
5. **Second Row: N, J, ?**
6. **Third Row: V, N, M**

### Examining Columns

**First Column:**
- H, N, V
  - Alphabetically, they are: H (8), N (14), V (22)
  - The differences: N - H = 6, V - N = 8
  - This doesn't reveal a simple pattern.

**Second Column:**
- D, J, N
  - Alphabetically, they are: D (4), J (10), N (14)
  - The differences: J - D = 6, N - J = 4
  - This also doesn't reveal a simple pattern.

**Third Column:**
- A, ?, M
  - Alphabetically, they are: A (1), ?, M (13)
  - The differences aren't clear without the middle letter.

### Examining Rows

**First Row:**
- H, D, A
  - Alphabetically, they are: H (8), D (4), A (1)
  - The differences: D - H = -4, A - D = -3

**Second Row:**
- N, J, ?
  - Alphabetically, they are: N (14), J (10), ?
  - The differences: J - N = -4
  - Continuing the pattern of differences: ? should be 10 - 4 = 6, which corresponds to the letter F.

**Third Row:**
- V, N, M
  - Alphabetically, they are: V (22), N (14), M (13)
  - The differences: N - V = -8, M - N = -1

### Conclusion

The most consistent pattern is in the second row, where the difference between the letters appears to be -4. Thus, following this pattern, the missing letter should be F (10 - 4 = 6).

So, the missing letter is **F**.

Would you like more details or have any questions? Here are some related questions you might find interesting:

1. What is the next letter in the sequence: A, D, G, J, ...?
2. How to find the missing number in a sequence of numbers?
3. What is the pattern in the following letter sequence: B, E, H, K, ...?
4. Can you identify the rule in the sequence: 2, 6, 12, 20, ...?
5. What is the relationship between the letters in the following pairs: (A, C), (B, D), (C, E), ...?

**Tip:** When solving pattern problems, try to identify consistent differences or relationships between the elements in the sequence.

Learn how to find the missing letter in the given alphabetical sequence: H D A, N J ?, V N M. Understand the pattern analysis and logic behind the sequence. Suitable for students in Grades 6-8.

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