Page 15 - Math 7

Set

5. Let's say and write the possible number of proper subsets of these sets.

(a) In {k} number of proper subsets = .....................................................

(b) In { 1, 4, 9 } number of proper subsets = .....................................................
6. Let's say and write the possible subsets of these sets.
(a) {P} ...............................................................................................................

(b) { 2, 7} ..............................................................................................................
7. Let's say and write which one is the universal set and its subset in the given
pairs of sets below.
a) A = { students of class 7 } and B = { boys of class 7 }
Universal set is .................. and subset is ..................

b) X = { even numbers less than 20 } and W = {whole numbers less than 20}.
Universal set is ....................... and subset is.......................
Creative section

8. a) Define the following types of sets with examples.
(i) Equal and equivalent sets (ii) Overlapping and disjoints sets

b) Define universal set and subset with examples.
c) Define proper and improper subsets with examples.
9. Let's list the elements of the following sets and write with reasons whether
they are equal or equivalent sets:
a) A = {days of the week starting with the letter S} and

B = {days of the week starting with the letter T}
b) M = {letters of the word 'FOLLOW'} and

N = {letters of the word 'WOLF'}
10. Let's list the elements of the following sets and write with reasons whether
they are overlapping or disjoint sets:

a) O = {odd numbers less than 10} and

S = {perfect square numbers less than 10}
b) X = {x : x is a prime number which exactly divides 30}
Y = {y : y is a prime number which exactly divides 77}

11. Let's write the possible subsets of the following sets and list the proper subsets
separately:

(a) F = {apple} (b) A = {1, 2} (c) E = {a, b, c} (d) T = {1, 2, 3, 4}

Approved by Curriculum Development Centre, Sanothimi, Bhaktapur 13 Vedanta Excel in Mathematics - Book 7