Help me with math homework!!!?

Question

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Answer 1

Subject: Greatest Common Factors
1) each section can hold the same number of skateboards..so the total number of SK's a shelf can hold , must be divisible by the number of skateboards that a section can hold.
GCD (8,12,18)= 4 skateboards
for the next problems, make the similar explanations...
the answers:
2) GCD (15,9,18)=3
3)GCD (14,12,8)= 2
4)GCD (45,81,63)=9
5)GCD (36,54,72)= 18
6) each member paid $18
so wednesday...36/18= 2 members
thursday: 54/18= 3 members
friday: 72/18=4 members
total: 2+3+4= 9 members

Answer 2

I just finished the quiz number 2.

first add them all together 15+9+18=42.
then divide it in 2= 42 divide2=21.
and divide it in 3.
and count how many 7s are there( you have to draw prime factor and get prime number). I'm not sure this is right answer but I hope I helped you ! Good luck ! ^0^