Fact or Feeling!
Is the set of months of the year with exactly 30 days a well-defined set or not well-defined?
Well-defined
Let B = {pencil, eraser, ruler, sharpener}. Which symbol completes the statement: marker___B?
∉
What is the cardinality of set A = {10, 20, 30, 40, 50}?
n(A) = 5
Is N = {natural numbers} well-defined or not well-defined?
Well-defined
Is the group mobile games well-defined or not well-defined?
Not well-defined
Let E = {2, 4, 6, 8, 10}. Which symbol (∈ or ∉) completes the statement: 4 ___ E?
∈
What is the cardinality of the V = {vowels found in the word APPLE}?
n(V) = 2
What is the cardinality of the empty set n(∅)?
n(∅) = 0
True or False: "The set of whole numbers between 1 and 2" is a well-defined set.
TRUE
If W = {north, south, east, west}, complete the statement: Up ___ W.
∉
What is n(Z) if Z = {0}?
n(Z)=1
True or False: In a set, identical or repeated elements are counted individually every time they appear.
FALSE
Which of the following is a well-defined set?
A. Popular TikTok dancers in Bulacan
B. Barangays in the municipality of Calumpit
B. Barangays in the municipality of Calumpit
{triangle, square, pentagon, hexagon}. Which statement is correct?
A. Circle ∈ T
B. Circle ∉ T
(B) Circle ∉ T
If Set L contains the distinct letters in the word 'SCHOOL', what is n(L)?
n(L)=5
Spot the error: A student writes the set of letters in the word "book" as B = {b, o, o, k}. What is the correct set notation?
B = {b,o,k}
Is "the set of intelligent Grade 7 students" a well-defined set or not well-defined?
Not well-defined
Given C = {6, 7, 8, 9}, use the correct symbol (∈ or ∉) to show whether 5 belongs to set C.
5 ∉ C
What is the cardinality of the C = {counting numbers between 5 and 6}?
n(C) = 0
Consider the set T of all distinct letters in the word PHILIPPINES that are also vowels. What its cardinality?
n(T) = 2