Please think of it this way:
There are three groups, the maximum number should be greater than one third of 16, and x >；; 16/3=5+ 1/3, so the minimum value of x is 6 because an integer is required.
According to the fact that the sum of two sides of a triangle must be greater than the third side, the maximum number in a group must be less than half of 16. X< 16/2=8, so the maximum value of x is 8- 1=7 because an integer is required.
When x=7, the remaining 16-7=9 is decomposed into the sum of two numbers, and the large number cannot be greater than 7, so it is
7,2
6,3
5,4
three
When x=6, the remaining 16-6= 10 is decomposed into the sum of two numbers, and the large number cannot be greater than 6, so it is:
6,6,4
6,5,5
two
One * * * equals five.