Set Theory Skills

What is the result of the union of two sets A and B?

• A complement B

• A union B

• A difference B

• A intersection B

If A = {1, 2, 3} and B = {3, 4, 5}, what is A ∩ B?

• {3}

• {1, 3, 4}

• {1, 2}

• {4, 5}

If A = {red, blue, green} and B = {green, yellow, purple}, what is A ∪ B?

• {red, blue, green, yellow, purple}

• {red, blue, yellow, purple}

• {red, blue, green, yellow}

• {red, blue, yellow}

What is the intersection of two disjoint sets?

• Complement of the sets

• Empty set

• Union of the sets

• Non-empty set

If A = {2, 4, 6, 8} and B = {3, 6, 9}, what is A ∩ B?

• {4}

• {2}

• {8}

• {6}

If A = {apple, banana, cherry} and B = {banana, cherry, date}, what is A ∪ B?

• {apple, banana, cherry, date}

• {apple, cherry, date}

• {apple, banana, date}

• {apple, banana, cherry, date}

What is the union of two identical sets?

• The union of two identical sets is an empty set.

• The union of two identical sets is a set with one element.

• The union of two identical sets is a set with different elements.

• The union of two identical sets is the set itself.

If A = {1, 2, 3, 4} and B = {3, 4, 5, 6}, what is A ∩ B?

• {1, 2}

• {2, 3, 4}

• {5, 6}

• {3, 4}

If A = {x, y, z} and B = {y, z, w}, what is A ∪ B?

• {x, y, z, w}

• {x, y, w}

• {x, z, w}

• {x, y}

What is the intersection of two sets with no common elements?

• Infinite set

• Singleton set

• Universal set

• Empty set