Selina Concise Class 6 Math Chapter 10 Sets Exercise 10B Solution
EXERCISE 10B
(1) If set A = {2, 3, 4, 5, 6}, state which of the following statements are true and which are false:
(i) 2 ∈ A ⇒ True
(ii) 5, 6 ∈ A ⇒ True
(iii) 3, 4, 7 ∈ A ⇒ False
(iv) 2, 8 ∈ A ⇒ False
(2) If set B = {4, 6, 8, 10, 12, 14}, state which of the following statements is correct and which is wrong:
(i) 5 ∈ B ⇒ Wrong, 5 ∉ B
(ii) 12 ∈ B ⇒ Correct
(iii) 14 ∈ B ⇒ Correct
(iv) 9 ∈ B ⇒ Wrong 9 ∉ B
(v) Correct
(vi) Correct
(3) State whether true or false:
(i) False
(ii) True
(iii) False
(iv) True
(v) True
(vi) True
(vii) True
(4) Write the set containing:
(i) {1, 2, 3, 4, 5}
(ii) {acute-angle, right-angle, obtuse-angle}
(iii) {scalene-triangle, isosceles-triangle, equilateral-triangle}
(iv) {Raj, Neel, Ron}
(v) {b, c, d, f, g}
(vi) {a, e, I, o}
(vii) {Indira Gandgi, Atal Bihari Bajpai, Dr. Manmohan Singh}
(5) (a) Write the members (elements) of each set given below:
(i) 3, 8, 5, 15, 12, 7
(ii) c, m, n, o, s
(b) Write the sets whose elements are:
(i) {2, 4, 8, 16, 64 and 128}
(ii) {3, 5, 15, 45, 75, 90}
(6) (i) {b, h, o, p , a, l}
(ii) {e, a}
(iii) {h, n, g, k}