Question

and the
numbe
Exercise 3.1
ene
ad
Fill in the blanks.
a) 1 is
prime
composite.
b)
is the smallest odd composite number
c) 53 and 55 is a pair of
numbers.
d) 4 is the
even composite number.
Find the factors of following numbers.
a) 85
b) 72
c) 108
Find the common factors of each set of numbers.
a) 12, 18
b) 14, 21 c) 28, 30, 42
d) 122
3.
d) 20, 35, 45
5.
Write the first five multiples of the following numbers.
a) 19
b) 25
c) 32
d) 37
Find the first three common multiples of the following numbers.
a) 18,6
b) 14,4
c) 5, 10, 15 d) 15, 12,6
Underline the prime numbers and circle the composite numbers.
4 16 8 3 11 15 25 31
29 56 22 103 17 26 13 47
6.
mbe
7 Which of the following pair of numbers is a coprime?
a) 5 and 15
b) 21 and 27 c) 7 and 42 d) 12 and 17
8. Which of the following pair of numbers are twin primes?
a) 8 and 9 b) 13 and 15 c) 31 and 33 d) 41 and 43​

Answer 1

Answer:

pure textbook he puch le kya

Step-by-step explanation:

and the

numbe

Exercise 3.1

ene

ad

Fill in the blanks.

a) 1 is

prime

composite.

b)

is the smallest odd composite number

c) 53 and 55 is a pair of

numbers.

d) 4 is the

even composite number.

Find the factors of following numbers.

a) 85

b) 72

c) 108

Find the common factors of each set of numbers.

a) 12, 18

b) 14, 21 c) 28, 30, 42

d) 122

3.

d) 20, 35, 45

5.

Write the first five multiples of the following numbers.

a) 19

b) 25

c) 32

d) 37

Find the first three common multiples of the following numbers.

a) 18,6

b) 14,4

c) 5, 10, 15 d) 15, 12,6

Underline the prime numbers and circle the composite numbers.

4 16 8 3 11 15 25 31

29 56 22 103 17 26 13 47

6.

mbe

7 Which of the following pair of numbers is a coprime?

a) 5 and 15

b) 21 and 27 c) 7 and 42 d) 12 and 17

8. Which of the following pair of numbers are twin primes?

a) 8 and 9 b) 13 and 15 c) 31 and 33 d) 41 and 43