34
the sum is 34. good luck!
The constant is 34.
15, 34 and 42.
15-34-42
34 I think.
15 34 42
The first magic sum is 15, the second one is 34, and the third one is 42.
try 34
for the first and second, its 15 and 34
It's an example of "addition".The sum is: 2 sqrt(34) .
the answer is 34