Question 255606
The sum of 7 non negative numbers must be 49 if the average of 7 is 7. Suppose you start at 1. We have 1, 2, 3, 4, 5, 6. Now we need to sum to 49. We have 21 right now, so we need another 28.
The seven numbers are:
1, 2, 3, 4, 5, 6, and 28.