# Collins Maths Solutions Class 7 Chapter 5

## Collins Maths Solutions Class 7 Chapter 5 Sets

Welcome to NCTB Solution. Here with this post we are going to help 7th class students for the Solutions of Collins Maths Class 7 Mathematics, Chapter 5, Sets. Here students can easily find chapter 5 solutions with exercise wise explanation. Students will find proper solutions for Exercise 5.1, 5.2 and 5.3 Our teacher’s solved every problem with easily understandable methods so that every students can understand easily. Here in this post all the solutions are based on ICSE latest Syllabus.

Sets Exercise 5.1 Solution :

Question no – (1)

Solutions :

(a) Yes, it make a set.

(b) Yes, it make a set.

(c) No, it cannot make a set.

(d) Yes, it make a set.

(e) No, it is cannot make a set.

Question no – (2)

Solutions :

(a) In roster form,

= B = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}

(b) In roster form,

= E = { 100, 102, 104, 106, 108, 110, 112, 114, 1116, 118}

(c) In roster form,

= 12 = { 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98}

(d) In roster form,

= A = {13, 39, 65, 91, 117}

(e) In roster form,

= C = { b, h, r, t}

Question no – (3)

Solutions :

(a) In set-builder form,

=  A =  {x : x is a multiple of 5, x < 35}

(b) In set-builder form,

=  P =  {x : x is a prime number, x < 13)

(c) In set-builder form,

= S = { x : x is a letter in the word ‘mathematics}

(d) In set-builder form,

= F {x : x is a vowel in the English Alphabet}

(e) In set-builder form,

=  N = { x : x is a month in a year from January to June}

Question no – (4)

Solutions :

(a) Cardinal number,

= x (A) =  8

(b) Cardinal number,

= x (B) = 7

(c) Cardinal number,

= x (C) =  1

(d) Cardinal number,

= x (D) = 2

(e) Cardinal number,

= x (E) = 21

(f) Cardinal number,

= x (F) = 4

Sets Exercise 5.2 Solution :

Question no – (1)

Solutions :

(a) This is not Equivalent.

(b) This is Equivalent set.

(c) This is Equivalent set.

(d) This s not Equivalent set.

(e) This is Equivalent set.

Question no – (2)

Solutions :

(a) This is Equal set C ad D

(b) This is not Equal set because number of elements are not same.

(c) This is not a Equal set.

(d) This is Equal set.

(e) This is Equal set.

Question no – (3)

Solutions :

(a) This is Empty set.

(b) This is a Singleton set.

(c) This is a Singleton set.

(d) This is Empty set.

(e) This is Empty set.

Question no – (4)

Solutions :

(a) This is finite set.

(b) This is infinite set.

(c) This is finite set.

(d) This is infinite set.

(e) This is finite set.

Question no – (5)

Solutions :

 Example : Type of Set : (a) Set of all the multiples of 3. (iii) Infinite set. (b) Set of people working in a company. (i) Finite set. (c) Set of the first 5 whole numbers and the set of the first 5 natural numbers. (iv) Equivalent set. (d) A = {x | x ∈ N, 9< x < 10 (vi) Empty set. (e) C = Set of composite numbers between 0 and 6. (v) Singleton set. (f) A = {x | x is an even prime number} and B = {2} (ii) Equal set

Sets Exercise 5.3 Solution :

Question no – (1)

Solutions :

(a) This is a Disjoint set.

(b) This is a Overlapping set.

(c) This is a Overlapping set.

(d) This is a Disjoint set.

(e) This is a Disjoint set.

Question no – (2)

Solutions :

(a) Universal set,

= u = {a, b, c, d, e, f, g, h, i, j}

(b) Universal set,

= u = {-1, -2, -3, -4, -5, -6, -7, -8, -8, -9, -10}

(c) Universal set,

= u = 2, 4, 6, 8, 10, 12, 14, 16, 18}

(d) Universal set,

= u = {2,3, 5, 7, 11, 13, 17, 19, 23, 31}

(e) Universal set,

= u = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}

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Updated: June 15, 2023 — 7:15 am