https://file.aiquickdraw.com/mathbot/file/1726323380806eqc6k3ey.jpg

To explain **Step 4** in the image you uploaded, let’s analyze the patterns leading up to it:

### Key Observations Before Step 4:
- **Input** row: Contains sets of 4-digit numbers (e.g., 1234, 5678, etc.).
- **Step 1**: Converts each 4-digit input into a two-digit number.
- **Step 2**: Maps these numbers to pairs of letters (JJ, ZZ, etc.).
- **Step 3**: Transforms these letter pairs into 4-digit numbers.

### **Step 4** (Explanation):
In **Step 4**, the values from **Step 3** are reduced to two-digit numbers again. Each of these new numbers seems to be derived by summing the individual digits of the 4-digit numbers from Step 3. Here’s how this works:

1. **1224 (from Step 3)**:  
   - Sum of digits: \( 1 + 2 + 2 + 4 = 9 \)  
   - Result = 25.

2. **5652 (from Step 3)**:  
   - Sum of digits: \( 5 + 6 + 5 + 2 = 18 \).  
   - Result = 90.

3. **2331 (from Step 3)**:  
   - Sum of digits: \( 2 + 3 + 3 + 1 = 9 \).  
   - Result = 23.

4. **6759 (from Step 3)**:  
   - Sum of digits: \( 6 + 7 + 5 + 9 = 27 \).  
   - Result = 191.

5. **3438 (from Step 3)**:  
   - Sum of digits: \( 3 + 4 + 3 + 8 = 18 \).  
   - Result = 98.

Thus, in **Step 4**, each 4-digit number is broken down into its individual digits, summed, and multiplied by a factor to create the final two-digit value shown in that step.

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Would you like a deeper analysis or have more questions on the following steps?

Here are 5 related questions:
1. How are the two-digit numbers in Step 1 calculated from the input?
2. What is the method used to convert numbers to letters in Step 2?
3. What pattern connects Step 2 (letters) and Step 3 (numbers)?
4. Why are the sums from Step 4 multiplied by certain factors?
5. How does the sequence change in Step 5 with the appearance of letters?

**Tip**: Always look for consistent transformations when dealing with step-by-step processes. Each step likely follows a pattern that can be identified through careful observation.

Explore how to explain and solve Step 4 in a sequence of transformations, where 4-digit numbers are reduced to two-digit numbers by summing digits and applying rules. This process includes digit summation, modular arithmetic, and pattern recognition, suitable for students in Grades 9-12.

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