Answer:
10, 20w, 2w and w
Explanation:
Common factors are numbers that can be multiplied by another number to get two or more different numbers.
In this case, we have:
20w and 40wz
Factors of 20w are:
2, 4, 5, 10, 20 and w; or the combination of both: 2w, 4w, 5w, 10w, 20w
Factors of 40wz are:
2,4,5, 8, 10, 20,...etc. and w and z; or the combination of the three.
To find the common factors we have to see which factors are common between the two:
2, 4, 5, 10, 20, w or the combinations:
2w, 4w, 5w, 10w, 20w.
Now we have to select from the options:
10, 20w, 2w and w