If A = {5, {5, 6}, 7}, which of the following is correct?
A. {5, 6} ∈ A

B. {5} ∈ A

C. {7} ∈ A

D. {6} ∈ A

Write the following sets in Roster form

Given A = {5, 6, 7, 8}. Which one of the following is incorrect?

Which of the following is incorrect?

Which of the following is correct?

If X = {a, {b, c}, d}, which of the following is a subset of X?

Which of the following is a correct statement?

If A = {5, {5, 6}, 7}, which of the following is correct?

Find the cardinal number of the following sets

i.

ii. B = {x : x is a consonant in English Alphabet}

iii. X = {x: x is an even prime number}

iv.

v.

Which of the following are sets? Justify your answer.

i. The collection of good books

ii. The collection of prime number less than 30

iii. The collection of ten most talented mathematics teachers.

iv. The collection of all students in your school

v. The collection of all even numbers.

Write the following sets in Descriptive form

i. A = {a, e, i, o, u}

ii. B = {1, 3, 5, 7, 9, 11}

iii. C = {1, 4, 9, 16, 25}

iv. P = {x : x is a letter in the word ‘set theory’}

v. Q = {x : x is a prime number between 10 and 20}