Types of Sets: 5 practice questions

1. A = {1, 2, 3, 4} and B = {2, 4, 6}. What is A ∩ B?

   1. {2, 4}
   2. {1, 3}
   3. {6}
   4. {1, 2, 3, 4, 6}
   Show the answer

   Answer: A. {2, 4}

   The intersection holds only the members in BOTH sets.

2. A = {1, 2} and B = {2, 3}. What is A ∪ B?

   1. {2}
   2. {1, 3}
   3. {1, 2, 3}
   4. {1, 2, 2, 3}
   Show the answer

   Answer: C. {1, 2, 3}

   The union puts all members together, without repeating.

3. Two sets with NO common members are called:

   1. equal sets
   2. disjoint sets
   3. equivalent sets
   4. universal sets
   Show the answer

   Answer: B. disjoint sets

4. {1, 2} is contained inside {1, 2, 3}. So {1, 2} is a ___ of {1, 2, 3}.

   1. union
   2. subset
   3. universal set
   4. member
   Show the answer

   Answer: B. subset

   A subset is a set inside another set.

5. In a Venn diagram, the part where the two circles overlap shows the:

   1. union
   2. empty set
   3. intersection
   4. universal set
   Show the answer

   Answer: C. intersection

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