Direction: Encircle the letter of your answer. 1. Which of the following is a well-defined set? A. All the honest members in the family. B. All the efficient doctors of the hospital. C. All the hardworking teachers in a school. D. All the prime numbers less than 100. 2. What is the cardinality of set R, given that R = { factors of 36 }? A. 6 C. 9 B. 12 D. 15 3. Given that set V = {m, n, o, p), find the number of subsets of V. A. 16 C. 8 B. 10 D. 12 4. Which of the following are the examples of an empty set? A. The set of even natural numbers divisible by 3. B. The set of all prime numbers divisible by 2. {x: XEN, 5 < x < 6} D. The set of odd natural numbers divisible by 2 C. 5. What is AUB, given that sets A = {2, 3, 4, 5) and B = {2, 4, 5, 6}? A. 2,4,5) C. 2, 3, 4, 5, 6 B. {3} D. {6} 6. If M = {s, h} and D = {e, a, r, s} , what is MUD? A. {S} C. {s, h, a, r, e B. {h, e, a, r, t} D {s, h, a, r, e, s}​