6.5. In the record $52 * 2 *$, replace the asterisks with digits so that the resulting number is divisible by 36. List all possible solutions.
Solution: A number is divisible by 36 if it is divisible by both 4 and 9. Since the sum of the digits $5,2,2$ is 9, the sum of the two missing digits must be 0, 9, or 18. Considering that the number must be divisible by 4 and the second-to-last digit is 2, the last digit can only be 0, 4, or 8.

Answer: $52524,52128,52020,52920$.