Factors are multiplied, not added. The question needs to be something like, "Which two factors of thirty add up to 11?" The answer would then be 5 and 6.
The 8 factors of 56 are 1, 2, 4, 7, 8, 14, 28, and 56. 2 and 8 add up to 10. Also, 1, 2, and 7 add up to 10.
They are 1 and 2
35
91
15 and 4 are the factors of 120 that add up to 19.
26
-1, 6 and -12.
To find factors that add up to 240 and also add up to 140, we need to solve a system of equations. Let's represent the two factors as x and y. We have the equations x + y = 140 and x + y = 240. By solving this system, we find that the factors are 100 and 140.
113
262
149
-10 and 2 -12 and 4 -20 and 12
341
134
-102
Although negative numbers aren't usually considered factors, you can use -21, -3 and -2.