What is the missing digit to make each number divisible by 9 .7 and 1?

To determine the missing digit that makes a number divisible by 9, you need to ensure that the sum of the digits is divisible by 9. For divisibility by 7 and 1, any number is divisible by 1, and for 7, you can test the entire number (including the missing digit) against divisibility rules for 7. Without specific numbers provided, it's not possible to identify the exact missing digit, so you would need to apply these rules to the specific numbers in question.