please answer the person who has a good answer i will male brainl

Answer:
1. A
2. C
3. D
4. D
5. C
Step-by-step explanation:
1. 14 X 5 = 70
2. Because 31 cannot be multiplied by other numbers except 1.
3. 2 ÷ 16 = 8 | 2 ÷ 20 = 10
2 ÷ 8 = 4 | 2 ÷ 10 = 5
So you have to multiply 2 x 2 since it is the number used to devide and get the GCF.
4. Hard To Explain
5. 8 ÷ 4 = 2
12 ÷ 4 = 3
So thats why its ⅔