I need help with another question, s the set of multiples of 5 closed under division? Explain why or provide a counterexample if not.

A.
Yes, because the quotient of any two multiples of 5 is also a multiple of 5.

B.
Yes, because the quotient of any two multiples of 5 is also a multiple of 10.

C.
No, and a counterexample is 100 ÷ 5 = 20.

D.
No, and a counterexample is 25 ÷ 50 = .

I'd say D, would that be the right answer?

Question

I need help with another question, s the set of multiples of 5 closed under division? Explain why or provide a counterexample if not.
 
 A.
Yes, because the quotient of any two multiples of 5 is also a multiple of 5.
 
 B.
Yes, because the quotient of any two multiples of 5 is also a multiple of 10.
 
 C.
No, and a counterexample is 100 ÷ 5 = 20.
 
 D.
No, and a counterexample is 25 ÷ 50 =   .

I'd say D, would that be the right answer?

anonymous · Answer

Is* for the first word of the question

anonymous · Answer

@jim_thompson5910  Can you help me with 1 more?

jim_thompson5910 · Answer

yes 25/50 = 1/2 which is NOT a multiple of 5

anonymous · Answer

Ok then I was right! Great :D

anonymous · Answer

I got 80% on the test, thank you