1. What is the least common multiple of 4 and 9?

2. What is the greatest common factor of 18 and 30?

3. What is the greatest common factor of 28 and 64?
A. 2 B.4 C.7 D.8

4. what of the sums below can be expressed at 8(2+7)
A. 2+56 B. 10+15 C. 16+7 D.16+56

5. what of the following expresses 16+36 by using the greatest common factor of the two numbers?
A.4(4+9) B. 4(4+32) C. 8(2+28 D.8(8+28)​