Set Theory

What is the union of sets A = {1, 2, 3} and B = {3, 4, 5}?

• {1, 2, 3, 4, 5}

• {2, 3, 5}

• {1, 2, 3}

• {3, 4}

If A = {x | x is an even number} and B = {x | x is a prime number}, what is A ∩ B?

• {2}

• {6}

• {3}

• {4}

Determine the union of the sets C = {a, b} and D = {b, c, d}.

• {a, b, c}

• {a, b, c, d}

• {b, c}

• {a, d}

If E = {1, 2, 3} and F = {2, 3, 4}, what is E ∩ F?

• {2, 3, 4}

• {2, 3}

• {1, 2, 3, 4}

• {1, 4}

What is the result of the union of the sets G = {x | x < 5} and H = {x | x > 3}?

• {x | 3 < x < 5}

• {x | x > 5}

• {x | x < 3}

• (-∞, ∞)

Find the intersection of the sets I = {10, 20, 30} and J = {20, 40, 60}.

• {10}

• {60}

• {20}

• {30, 40}

If K = {1, 2, 3} and L = {3, 4, 5}, what is K ∪ L?

• {1, 2, 5}

• {1, 2, 3, 4, 5}

• {3, 4}

• {1, 2, 3}

What is the intersection of the sets M = {a, b, c} and N = {c, d, e}?

• {c}

• {d, e}

• {c, d}

• {a, b}

Determine the union of the sets O = {1, 2} and P = {2, 3, 4}.

• {1, 2, 3, 4}

• {2, 3}

• {1, 2, 4}

• {1, 3, 4}

If Q = {x | x is a multiple of 3} and R = {x | x is a multiple of 5}, what is Q ∩ R?

• {x | x is a multiple of 3 and 5}

• {x | x is a multiple of 15}

• {x | x is a multiple of 5}

• {x | x is a multiple of 10}