Fun with Sets

What is a set?

• A set is a random assortment of items.

• A set is a single object.

• A set is a collection of distinct objects.

• A set is a collection of identical objects.

What do we call a set that contains all possible elements?

• Empty set

• Finite set

• Subset

• Universal set

What is the union of sets A = {1, 2} and B = {3, 4}?

• {1, 2}

• {3, 4}

• {1, 2, 3}

• {1, 2, 3, 4}

If the universal set is {1, 2, 3, 4, 5}, what is the complement of A = {1, 2}?

• {3, 4, 5}

• {1, 4, 5}

• {2, 3, 4}

• {1, 2, 3}

How many elements are in the universal set if it is {a, b, c, d, e}?

• 5

• 3

• 4

• 6

What is the difference between sets A = {1, 2, 3} and B = {2, 3}?

• The difference is {1}.

• The difference is {2, 3}.

• The difference is {}.

• The difference is {1, 2, 3}.

If C = {x | x is a vowel}, what are the elements of C?

• C = {B, C, D, F}

• C = {A, E, I, O, U}

• C = {A, E, I, O}

• C = {A, E, I, O, U, Y}

What is the empty set?

• A set containing one element, denoted as {x}.

• The empty set is a set with no elements, denoted as {}.

• A set that includes all possible elements, denoted as U.

• A set that contains only null values, denoted as {null}.

If D = {1, 2, 3} and E = {1, 2, 3, 4, 5}, is D a subset of E?

• Yes, D is a subset of E.

• No, D is not a subset of E.

• D contains elements not in E.

• D is equal to E.

What is the cardinality of the set {apple, banana, cherry}?

• 4

• 3

• 5

• 2