Question

find the HCF by long division method of 420 and 360​

Answer 1

LLO

U

120 allu JOU.

2

14,

7,

Now, the HCF of 420 and 360 = 60

So, the required size of the slab must be 60 cm x 60 cm.

Area of the floor

Hence, the number of slabs required

Area of one slab

420 x 360

60 x 60

-

= 42

Thus, the required number of marble slabs is 42.

se 3.3

8, 27

the HCF of the following set of the numbers by listing factors method:

b) 24, 32

c) 12,30

d) 27, 54, 45

che HCF of the following set of the numbers by prime factorisation method:

04, 180

b) 225, 375

c) 524, 128, 56 d) 88, 64, 90, 30

he HCF of the following set of the numbers by long division method:

5, 625

b) 224, 1500, 1440 c) 422, 345

d) 110, 770, 1331

e HCF of the following set of the numbers by short division method:​