Question

medal @pooja195
Is the set of multiples of 4 closed under addition? Explain why or provide a counterexample if not.









A.

Yes, because the sum of any two multiples of 4 is also a multiple of 4.








B.

Yes, because the sum of any two multiples of 4 is also a multiple of 8.








C.

No, and a counterexample is –4 + (–8) = –12.








D.

No, and a counterexample is 26 + 16 = 42.

Answer 1

@Susanna

Answer 2

@Howard-Wolowitz

Answer 3

I can help

Answer 4

I guess

Answer 5

but explain what you mean with the question since it is vague

Answer 6

I got the answer and I want a medal if I do

Answer 7

and if you don't I report

Answer 8

it is A

Answer 9

I was first so yea medal me