1 + 14, 2 + 13, 3 + 12, ...
1.1 + 13.9, 1.2 + 13.8, 1.3 + 13.7, ....
1.01 + 13.99, 1.02 + 13.98, 1.03 + 13.97, ...
And then there are sets of 3 numbers, 4 numbers, and so on.
30
The given numbers of 15 and 35 are not prime numbers but they add up to 50
15+15+1=31
15
Impossible.
The numbers are 15, 16 and 17.
You can't make 15 with even numbera
31
23
The numbers are 11, 13 and 15.
45
71