What is a set?

• A set is a unit of measurement.
• A set is a collection of distinct elements with no specific order.
• A set is a type of musical instrument.
• A set is a group of animals.

The set of natural numbers is infinite.

• Partially true
• Maybe
• True
• False

The symbol for the empty set is ____.

C = {x | x is an even number between 1 and 10}.

Which of the following sets is equal to {2, 4, 6, 8, 10}?

• Odd numbers from 1 to 9 inclusive
• Prime numbers from 2 to 10 inclusive
• Multiples of 3 from 1 to 10 inclusive
• Even numbers from 2 to 10 inclusive

The set {1, 2, 3} is a subset of the set {1, 2, 3, 4, 5}.

• Maybe
• No
• Sometimes
• Yes

The number of subsets of a set with 3 elements is ____.

Which of the following is the power set of {a, b}?

• {{{a}, {b}}}
• {{{}, {a}, {b}}}
• {{{}, {a, b}}}
• {{{}, {a}, {b}, {a, b}}}

Describe the set-builder notation for the set of all even integers.

• {x | x is a prime number and x is even}
• {x | x is a real number and x is even}
• {x | x is an integer and x is odd}
• {x | x is an integer and x is even}

A = {x | x is a prime number less than 10}, what is A?

• {1, 3, 5, 7}
• {2, 4, 6, 8}
• {2, 3, 5, 7}
• {3, 5, 7, 9}