What is the maximum and minimum number of digits in the sum of any two 6-digit numbers?

To determine the maximum and minimum number of digits in the sum of any two 6-digit numbers, let's break the problem into steps.

Step 1: Maximum Number of Digits
The maximum 6-digit number is 999,999, and the sum of two such numbers would be: 999,999 + 999,999 = 1,999,998.

This sum has 7 digits. Therefore, the maximum number of digits in the sum of any two 6-digit numbers is 7.

Step 2: Minimum Number of Digits
The minimum 6-digit number is 100,000, and the sum of two such numbers would be: 100,000 + 100,000 = 200,000.

This sum has 6 digits. Therefore, the minimum number of digits in the sum of any two 6-digit numbers is 6.

Conclusion:
Maximum number of digits: 7
Minimum number of digits: 6