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.
-10 & -18
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 factors of -504 are 2, 2, 2, 3, 3, 7 and -1. Then the factors that add to -3 are -24 and 21.
They are 1 and 2
1666
The factors of 8 are 1, 2, 4, and 8. The factors that add up to 10 are 2 and 8.
1510
100 has nine factors: 1, 2, 4, 5, 10, 20, 25, 50, 100.
-10 and +10.
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.
268
-10 & -18
-589
-46
12610
$2.50: A quarter is 25 cents, which is $.25. 0.25 x 10 =$2.50