How about: 23+3 = 26 as one example
They are: 23+3 = 26
29
13, 17, and 13. 13+13 = 26 + 17 = 43
Although negative numbers aren't usually considered factors, you can use -21, -3 and -2.
Add all the numbers up. Divide the answer you get by the amount of numbers there are. Viola! You have the average! E.g. Average of: 7, 3, 4, 6, 6. 7+3+4+6+6 = 26 26 divided by 5 (because that's how many numbers there are) = 5.2 5.2 is your average :)
83, 3,and 2 are prime numbers which add up to 88.
53 and 3 are two prime numbers that add up to 56
2 numbers that add up to 8
There are no two prime numbers that add up to be 152.
103
No three odd numbers can add up to an even number.