Which of the following are sets? Justify our answer.

The collection of all months of a year beginning with the letter J.

Concept: Sets and Their Representations

Which of the following are sets? Justify our answer.

The collection of ten most talented writers of India.

Concept: Sets and Their Representations

Which of the following are sets? Justify our answer.

A team of eleven best-cricket batsmen of the world.

Concept: Sets and Their Representations

Which of the following are sets? Justify our answer.

The collection of all boys in your class.

Concept: Sets and Their Representations

Which of the following are sets? Justify our answer.

The collection of all natural numbers less than 100.

Concept: Sets and Their Representations

Which of the following are sets? Justify our answer.

A collection of novels written by the writer Munshi Prem Chand.

Concept: Sets and Their Representations

Which of the following are sets? Justify our answer.

The collection of all even integers.

Concept: Sets and Their Representations

Which of the following are sets? Justify our answer.

The collection of questions in this Chapter.

Concept: Sets and Their Representations

Which of the following are sets? Justify our answer.

A collection of most dangerous animals of the world.

Concept: Sets and Their Representations

Let A = {1, 2, 3, 4, 5, 6}. Insert the appropriate symbol ∈or ∉ in the blank spaces:

**(1)** 5…A

**(2**) 8…A

**(3)** 0…A

**(4)** 4…A

**(5)** 2…A

**(6)** 10…A

Concept: Sets and Their Representations

Write the following sets in roster form: A = {*x*: *x* is an integer and –3 < *x *< 7}.

Concept: Sets and Their Representations

Write the following sets in roster form:

B = {*x*: *x* is a natural number less than 6}.

Concept: Sets and Their Representations

Write the following sets in roster form:

C = {*x*: *x* is a two-digit natural number such that the sum of its digits is 8}

Concept: Sets and Their Representations

Write the following sets in roster form:

D = {*x*: *x* is a prime number which is divisor of 60}.

Concept: Sets and Their Representations

Write the following sets in roster form:

E = The set of all letters in the word TRIGONOMETRY.

Concept: Sets and Their Representations

Write the following sets in roster form:

F = The set of all letters in the word BETTER.

Concept: Sets and Their Representations

Write the following sets in the set-builder form: (3, 6, 9, 12)

Concept: Sets and Their Representations

Write the following sets in the set-builder form: {2, 4, 8, 16, 32}

Concept: Sets and Their Representations

Write the following sets in the set-builder form: {5, 25, 125, 625}

Concept: Sets and Their Representations

Write the following sets in the set-builder form: {2, 4, 6 …}

Concept: Sets and Their Representations