To find factors of 28 that add up to 18, we first list the factors of 28: 1, 2, 4, 7, 14, and 28. We then check pairs of these factors to see which add up to 18. The only pair that meets this criterion is 14 and 4, since 14 + 4 = 18. Thus, the factors of 28 that add up to 18 are 14 and 4.
268
23
The distinct prime factors of 550 are 2, 5 and 11. They add up to 18.
6, 12 and 18
The factors of 18 are: 1 2 3 6 9 18 The prime factors are: 2 x 3 x 3
268
23
18 and 3 are factors of 162.
-10 & -18
360
-20 and 2
The distinct prime factors of 550 are 2, 5 and 11. They add up to 18.
First list the factors of each. For 18, that's 1, 2, 3, 6, 9, and 18. For 20, that's 1, 2, 4, 5, 10, and 20. From these, you could add all of the factors of 18 to get 39. Or you could add 20, 10, and 9. Or 20, 10, 5, and 4. Or . . . you get the idea.
91
815
-25
46