seven numbers that add up to 49.
60 10 7
No two of those numbers add up to 17.
-1
There are no three consecutive numbers that add up to twenty.Proof:5+6+7=186+7+8=217+8+9 = 24
3
Can not be done! An odd number of odd numbers will ALWAYS add up to an odd number.
if you mean what three prime numbers add up to a prime number then the answer is : 5 + 7 + 11 = 23
21
7 and 67.
7, 13 and 17
7 and 5