Answer:
5 ham sandwiches
Explanation:
To find the number of ham sandwiches sold, we should find the pair of numbers that have a difference of 6 and add to 16.
- 1 ham sandwich, 7 turkey sandwiches = 8 sandwiches
- 2 ham sandwiches, 8 turkey sandwiches = 10 sandwiches
- 3 ham sandwiches, 9 turkey sandwiches = 12 sandwiches
- 4 ham sandwiches, 10 turkey sandwiches = 14 sandwiches
- 5 ham sandwiches, 11 turkey sandwiches = 16 sandwiches
While this method isn't always very efficient, it worked pretty well for this case!
Therefore, the answer is 5 ham sandwiches.