The question appears to be in Indonesian, and it roughly translates to:

"4. The correct number in the box marked '?' is:"

There are three cross-shaped grids provided, each filled with numbers. To solve this, we need to determine the pattern or relationship between the numbers and apply that to find the value of the missing number (marked by '?').

Let me analyze the pattern and compute the answer.

1. The first cross has the numbers:

   • 7 at the top
   • 9, 3, 6 in the middle
   • 2 at the bottom

2. The second cross has:

   • 8 at the top
   • 4, ?, 6 in the middle
   • 1 at the bottom

3. The third cross has:

   • 13 at the top
   • 19, 7, 11 in the middle
   • 5 at the bottom

Observing a potential pattern:

• For the first cross, the sum of the middle numbers (9 + 3 + 6) equals 18, which is twice the number at the top (7 * 2 = 14).
• In the third cross, the sum of the middle numbers (19 + 7 + 11) equals 37, which is almost three times the number at the top (13 * 3 = 39).

We might be dealing with a pattern where the middle numbers are proportional to the number at the top in some way.

Let me calculate the missing number based on this observation.The missing number (marked as '?') in the second cross is 6.

Would you like further explanation or details on this solution? Here are some related questions to expand your understanding:

1. How do different types of patterns appear in number puzzles like this?
2. Can we apply this pattern in other scenarios, or does it work only for this case?
3. How do symmetry and balance influence the design of such puzzles?
4. What are other methods to approach similar number puzzles?
5. Can you identify other mathematical properties from these grids?

Tip: When solving number pattern puzzles, always look for relationships between rows, columns, or groups of numbers. These patterns are often based on arithmetic operations like addition, multiplication, or geometric progressions.