The document contains 5 multiple choice questions that test concepts in set theory. Question 1 asks which is a well-defined set, question 2 asks to list the letters in the word "school", question 3 asks which is a subset of the set {1,2,3}, question 4 asks the cardinality of the letters in "mathematics", and question 5 asks which is not a subset of the set {n, e, w}.

1. Select the correct
answer. Write your
answer in ¼ sheet of
paper.

2. 1. Which of the following is a well-
defined set?
a. A set of beautiful sceneries
b. A set of good basketball players
c. A set of Philippine Presidents
d. A set of successful leaders.

3. 2. List all the letters in the word
“school”.
a. {s, c, h, o, o, l}
b. {s, c, h, o, l}
c. {s, h, o, o, l}
d. {s, c, o, l}

4. 3. Which of the following is a subset of
A= {1,2,3}?
a. {0}
b. {0,1}
c. {1,2}
d. {2,3,4}

5. 4. Given the set of letters in the word
“mathematics”, what is the cardinality of
the given set?
a. 11
b. 8
c. 6
d. 4

6. 5. The following is a subset of
R = {n, e, w}, EXCEPT?
a. {n, e, w}
b. {e}
c. {0}
d. { }