Sets - Introduction, Union and Intersection

What letter represents the set of integers?

• I

• N

• W

• Z

Which of the following represents the set of whole numbers?

• {1, 2, 3, ...}

• {0, 1, 2, 3, ...}

• {... -2, -1, 0, 1, 2, 3, ...}

• None of the above

Which of the following represents the set of natural numbers?

• {1, 2, 3, ...}

• {0, 1, 2, 3, ...}

• {... -2, -1, 0, 1, 2, 3, ...}

• None of the above

Which of the following Greek letters represents null set?

• θ

• Ø

• 𝞼

• €

Given that A = { 1, 2, 3, 4, 5} , B = { 2, 4, 6, 8, 10}. A and B are

• universal sets

• null sets

• equal sets

• equivalent sets

Given that A = { 1, 2, 3, 4, 5} , B = { 2, 3, 4, 5, 7, 9}. What is the union of A and B?

• { 1, 2, 3, 4, 5, 7, 9}

• { 2, 3, 4, 5, 7, 9}

• { 1, 2, 3, 4, 5}

• { 1, 2, 3, 4, 5, 9}

Given that A = { 1, 2, 3, 4, 5} , B = { 2, 3, 4, 5, 7, 9}. What is the intersection of A and B?

• { 1, 2, 3, 4, 5}

• { 2, 3, 4, 5}

• { 3, 4, 5}

• { 4, 5, }

State whether the following statement is true or false:

If A = {5, 6, 7} and B = {6, 8, 10, 12}; then A ∪ B = {5, 6, 7, 8, 10, 12}.

• True

• False

State whether the following statement is true or false:

Union of two sets is the set of elements which are common to both the sets.

• True

• False

State whether the following statement is true or false:

Two overlap sets have all the elements common.

• True

• False