Answer:
66
Explanation:
What is a factor?
A factor is many pairs of numbers multiplied by another number that equals that number
For example: If I were to say what are factors of 64 I would say 1, 2, 4, 8, 16, 32 and 64
The pairs would be
1 and 64
2 and 32
4 and 16
8 and 8
Realize that when they're multiplied, they equal to 64
so then going back to the question: What is the greatest common factor of 264, 132 and 66
So they're wanting you to look for a factor but not the least common factor but the greatest common factor
The greatest common factor would be 66 since it is the highest common factor that all 3 numbers have