1. which of the following is a well-defined set

a. a set of good writers
b. a set of factors of 3
c. a set of honest students in grade seven
d. a set of small numbers

2. which of the following is a symbol of null set?
Note: please view the pictures

3. Michelle listed the set of all letters in the word "serendipity" as shown below.

A= {s, e, r, e, n, d, i, t, y}
a. it uses commas
b. it uses baraces
c. the object in this set are not listed once.
d. a capital letters is used to represent this set

4. given the set of letters in the word "LOVE". What is the cardinality of the given set

a. 11
b. 8
c. 6
d. 4

5. what is the cardinality of {10, 20, ..., 80}?

a. 8
b. 10
c. 12
d. 14

6. the following are subsets of U= {5, 10, 15, 20, 25, 30, 35, 40, 45, 50}, EXCEPT?

a. {10, 20, 30, 50}
b. {5, 10, 15, 20, 25, 37, 40}
c. {5, 10, 25}
d. { }

7. how many subset does G= {t, e, a, m} have?

a. 4
b. 12
c. 16
d. 20

8. given A= {s, e, a, t} and B= {s, t, a, n, d}, find AUB.

a. {s, e, a, t, n, d}
b. {s, a, t}
c. {n, d}
d. {e}

9. given F= {o, r, a, n, g, e} and G= {y, e, l, o, w} find F G.

a. {o, r, a, n, g, e, y, l, w}
b. {o, r, a, n, g, e}
c. {y, e, l, o, w}
d. {e, o}

10. given X= {bus, jeepney, taxi, trycycle} and Y= {tricycle}, find the difference of Y and X.

a. {bus, jeepney, taxi, trycycle}
b. {bus, jeepney taxi}
c. trycycle
d. { }
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