Q.1. Which of the following are sets ?justify your answer

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

Q.1 Which of the following are sets ?justify your answer

(ii) The collection of ten most talented writers of India.

Q.1 Which of the following are sets ?justify your answer

(iii) A team of eleven best-cricket batsmen of the world.

Q.1 Which of the following are sets ?justify your answer

(iv) The collection of all boys in your class.

Q.1 Which of the following are sets? Justify your answer

(v) The collection of all natural numbers less than 100.

Q.1 Which of the following are sets? Justify your answer

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

Q.1 Which of the following are sets? Justify your answer

(vii) The collection of all even integers.

Q.1 Which of the following are sets? Justify your answer

(viii) The collection of questions in this Chapter.

Q.1 Which of the following are sets? Justify your answer

(ix) A collection of most dangerous animals of the world.

Q\cdot 2\, Let A = \left \{ 1,2,3,4,5,6 \right \}.Insert\, the\, appropriate\, symbol \in or\notin in\, the\, blank\, space : 

(i) 5_____A

(ii) 8_____A

(iii) 0_____A

(iv) 4_____A

(v) 2_____A

(vi) 10____A

Q 3. Write the following sets in roster form

\, \left ( i \right )\, A= \left \{ x\vdot:x\, is \, an\, integer\, and\, -3\leq x< 7 \right \}

Q 3. Write the following sets in roster form

\left ( ii \right )B= \left \{ x:x\, is \, a\, natural\, number\, less\, than\, 6 \right \}

Q.3 Write the following sets in roster form

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

Q.3  Write the following sets in roster form

(iv) D = {x : x is a prime number which is divisor of 60}

Q.3  Write the following sets in roster form

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

Q.3  Write the following sets in roster form

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

Q.4  Write the following sets in the set builder form

(i)  {3, 6, 9, 12}

Q.4  Write the following sets in the set builder form

(ii) {2,4,8,16,32}

Q.4 Write the following sets in the set builder form:

 (iii) {5, 25, 125, 625}

Q.4  Write the following sets in the set builder form: 

(iv)  {2, 4, 6, . . .}

Q.4 Write the following sets in the set builder form :

(v) {1,4,9, . . .,100}

Q.5 List all the elements of the following sets:

(i)  A = {x : x is an odd natural number}.

Q5 List all the elements of the following sets:

  (ii)  B= { x : x is an integer,  \frac{-1}{2} < x< \frac{9}{2} }

Q.5  List all the elements of the following sets:

(iii) C = {x : x is an integer, x^{2}\leq 4}

Q.5 List all the elements of the following sets:

(iv) D = {x : x is a letter in the word “LOYAL”}

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