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Worksheets

LCM, HCF, Prime Factorisation

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.

What does LCM stand for?

a)

Littlest Common Multiple

b)

Least Common Multiple

c)

Lesser Common Multiple

d)

Lowest Common Multiple

2.

What does HCF stand for?

a)

Huge Calculated Figure

b)

Highest Common Factor

c)

Highly Common Factor

d)

Hypothetical Common Fraction

3.

12 और 18 का LCM क्या है?

a)

24

b)

36

c)

30

d)

42

4.

24 और 36 का HCF क्या है?

a)

12

b)

18

c)

6

d)

30

5.

Express 36 as a product of its prime factors.

a)

2^3 x 3^2

b)

2^2 x 3^2

c)

2^2 x 3^3

d)

2^2 x 3^2 x 5

6.

Express 48 as a product of its prime factors.

a)

2^3 x 3

b)

2^4 x 3

c)

2^2 x 3^3

d)

2^2 x 3^2

7.

Find the LCM of 15 and 20.

a)

50

b)

45

c)

75

d)

60

8.

Find the HCF of 42 and 56.

a)

24

b)

14

c)

18

d)

10

9.

Express 60 as a product of its prime factors.

a)

2 x 3 x 3 x 5

b)

2^3 x 5

c)

2^2 x 3 x 5

d)

2 x 2 x 2 x 3 x 5

10.

Express 72 as a product of its prime factors.

a)

2 x 2 x 2 x 3 x 3

b)

2 x 2 x 2 x 2 x 2 x 3

c)

2 x 2 x 3 x 3 x 3

d)

2 x 2 x 2 x 2 x 3

11.

Find the LCM of 8 and 10.

a)

24

b)

50

c)

40

d)

12

12.

30 और 45 का HCF क्या है?

a)

15

b)

25

c)

20

d)

10

13.

Express 90 as a product of its prime factors.

a)

2 * 3 * 3 * 4

b)

2 * 3 * 4 * 5

c)

3 * 3 * 3 * 5

d)

2 * 3 * 3 * 5

14.

Express 100 as a product of its prime factors.

a)

2^3 * 5^1

b)

2^1 * 5^3

c)

2^2 * 5^2

d)

2^4 * 5^0

15.

16 और 24 का LCM क्या है।

a)

40

b)

32

c)

48

d)

56

16.

9 और 15 का LCM क्या है?

a)

18

b)

27

c)

45

d)

30

17.

Express 54 as a product of its prime factors.

a)

2 x 3 x 3 x 3 x 3

b)

2 x 2 x 3 x 3 x 3

c)

2 x 2 x 2 x 3 x 3 x 3

d)

2 x 2 x 2 x 2 x 3 x 3

18.

Express 75 as a product of its prime factors.

a)

3 x 5^2

b)

3^2 x 5

c)

2 x 5^3

d)

3 x 5 x 5

19.

Express 80 as a product of its prime factors.

a)

2^4 x 5

b)

2^3 x 5^2

c)

2^2 x 5^3

d)

2^5 x 5

20.

Find the LCM of 21 and 28.

a)

42

b)

56

c)

84

d)

63