Somewhat surprisingly, no.
12+13+14 :D * * * * * Sadly, not correct. They add to 39. Try 11 + 12 + 13 instead. or 35.9 and 0.1
No, no two of the numbers : 6 13 2 12 7 14 can be added up to produce 17.
71
no
no
No two of those numbers add up to 17.
Nope
39
12, 13, 14, 15, 16, 17, 18
No
No two of those numbers add to 17.
No pair of the numbers in that list have a sum of seven.