The greatest common factor of two numbers is 4!. Which of the following can be the second number, if one of the numbers is 8!?  Choose the correct answer: A) 3(5!) B) 4(5!) C) 5(5!) D) 6(5!) E) 4(4!)
GCF is the product of common factors of the numbers involved.   GCF = 4!   a = 8! = 8*7*6*5*4!   b will certainly have 5! and cannot have any more common factors with a (as this will increase the GCF)   Looking at the answers only 4 (4!) and 8! will have GCF as 4!   Ans 4(4!)
<result>E</result>
The greatest common factor of two numbers is 4!. Which of the following can be the second number, if one of the numbers is 8!?