Answer:
(a) 2
Step-by-step explanation:
You want the greatest common factor of 18, 24, 40.
Factors
The prime factorization of these numbers is ...
- 18 = 2 · 3²
- 24 = 2³ · 3
- 40 = 2³ · 5
The only common factor is 2.
2 is the greatest common factor of 18, 24, and 40.
