
Subset
Not Always Numbers
A subset can include any related items, not just numbers.

Painters such as Monet and Degas are a subset of Impressionist artists.
Proper vs Improper
A proper subset doesn't contain all elements of the original set.
The set {1, 2} is a proper subset of {1, 2, 3}.
Inclusion Doesn't Equal Equality
A set with all items from another set is a subset but not vice versa.

The set of all fruits is a subset of all foods, but they are not the same.
Compare with
DivisionPortionSectionSubgroup
WordUp Chrome Extension
As you browse the web instantly look up words you don’t know.
Get Chrome Extension