Sets and Subsets

Which of the following is a set?

• {2, 4, 6, 8}

• {tall, taller, tallest}

• {beautiful girls in class}

• {numbers between 2 and 3}

What do we call each object or item in a set?

• Subset

• Collection

• Group

• Member

Which of the following represents a set in roster form?

• {x|x is a vowel in the alphabet}

• {a, e, i, o, u}

• {x|x < 10}

• {all odd numbers less than 10}

How many subsets does the set A = {1, 2} have?

• 2

• 3

• 4

• 5

What is the subset of B = {a, b, c}?

• {a, b, c, d}

• {b, c}

• {x, y}

• {1, 2, 3}

The symbol "⊆" means:

• Equal sets

• Not equal sets

• Subset

• Intersection

What is the number of subsets of the set {x, y, z, w}?

• 4

• 8

• 12

• 16

Which of the following is a proper subset of {1, 2, 3}?

• {1, 2}

• {1, 2, 3}

• {1, 2, 3, 4}

• {4}

Which of the following statements is TRUE?

• Every set is a subset of itself

• {a, b} is not a subset of {a, b, c}

• The empty set is not a subset of any set

• A subset must have more elements than the main set

If A = {1, 2, 3, 4}, which is NOT a subset of A?

• {2, 3}

• {1, 2, 3, 4}

• {5}

• {1}