The document describes an activity where students are asked to group various items and then answer questions about the groupings. There are 6 groups identified: head covers, trees, even numbers, polyhedrals, round objects, and pointy objects. Each item belongs to a group. Hats belong to both the head covers group and the round objects group, while some trees and polyhedrals belong to both their original groups and the pointy objects group.

4. Activity: Given some items below. Group them accordingly.
Write your groupings in your notebook then answer the
following questions:
 How many groups are there?
 Does each object belong to a group?
 Is there an object that belongs to more
than one group? Which one?

5.  How many groups are there?
 6, There is the set of head covers
(hats), the set of trees, the set of
even numbers, and the set of
polyhedrals. But, there is also a
set of round objects and a set of
pointy objects. There are 6 well-
defined sets.
 Does each object belong to a group?
 Is there an object that belongs to more
than one group? Which one?

6. Activity: Given some items below. Group them accordingly.
Write your groupings in your notebook then answer the
following questions:
 How many groups are there?
 6, There is the group of head
covers (hats), the group of trees,
the set of even numbers, and the
group of polyhedrals. But, there is
also a group of round objects and a
group of pointy objects. There are
6 well-defined sets.
 Does each object belong to a group?
 Yes.
 Is there an object that belongs to more
than one group? Which one?

7. Activity: Given some items below. Group them accordingly.
Write your groupings in your notebook then answer the
following questions:
 How many groups are there?
 6, There is the set of head covers (hats),
the set of trees, the set of even
numbers, and the set of polyhedrals.
But, there is also a set of round objects
and a set of pointy objects. There are 6
well-defined sets.
 Does each object belong to a group?
 Yes.
 Is there an object that belongs to more than
one group? Which one?
 All the hats belong to the set of round
objects. The pine trees and two of the
polyhedrals belong to the set of pointy
objects.