Question

The set A = {1,2,3,4}, and B is a subset of A. If the set {1,2} is NOT a subset of B, then what would the set be look like? That is:

{1,2} NOT subset B IS a subset of {1,2,3,4}.

I hope that is clear.

Answer 1

Can be contain only one of the elements of {1,2}? For instance, can the subset B be {1,3.4}?

Answer 2

Whoops. Meant to say "Can B"

Answer 3

http://mathinsight.org/subset_definition
Have a look

Answer 4

Great! Thanks! So, if the set B = {1,3,4}, since it contains elements that are not in {1,2}, then it holds true that {1,2} is not a subset of {1,3,4}.

Answer 5

So you're saying A = {1, 2, 3, 4} and you're inquiring about some subset of A, named B.
What you know about B is that the set {1,2} is not a subset of B.

Am I correct in stating the problem?

Answer 6

That is correct.

Answer 7

yes, if B = {1, 3, 4} then B is a subset of A, but the set {1, 2} is not a subset of B.

Answer 8

I realize that the one answer I've given is not all of the possibilities.

Answer 9

Awesome. Thank you for your help.

Answer 10

of course, there should be a few.

Answer 11

you're welcome!