1+2+3+6 is one possible answer.
23
3+9, 4+8,5+7,6+6
Factors of 12 are: 1/12, 2/6 and 3/4. Only set which add up to 7 are 3 & 4.
4950
There are several pairs of numbers that add up to 12. For example, 3 and 9, 4 and 8, or 6 and 6 all equal 12 when combined. Additionally, any number can form a pair with another number, such as 1 and 11, or 5 and 7, as long as their sum is 12.
30
The two prime numbers that add up to 19 are 7 and 12. Prime numbers are numbers greater than 1 that can only be divided by 1 and themselves. In this case, 7 and 12 are not prime numbers, and there are no two prime numbers that add up to 19.
There are two sets of two numbers that have cubes that add up to 1729 are {1, 12} : 1³ + 12² = 1 + 1728 = 1729 {9, 10} : 9³ + 10³ = 729 + 1000 = 1729
23
The factor pairs of 12 are (12, 1) (6, 2) (4, 3) None of them add up to 5.
-155
1, 2, 4, 5
1, 2 and 12 is one possible triplet.
-9
3+9, 4+8,5+7,6+6
-1
any 3 numbers that add up to 48, e.g. 12+23+13 or 24+23+1 the list goes on but the 3 numbers MUST add up to 48 to get the mean of 16