Question

HCF of 18,45, 72 with steps

Answer 1

Heya..

18 = 2*3*3
45 = 5*3*3
72 = 2*2*2*3*3

3 and 3 are common

Multiplying them gives 9...

9 is THE HCF..

Hope it helps ya :)

Answer 2

HCF of 18,45, 72 is 9.

Given:

The numbers 18, 45 and 72

To Find:

HCF of 18,45, 72

Solution:

Factorizing 18,45, and 72 we get

18 = 2 x 3 x 3 =2 x  $3^{2}$

45 = 3 x 3 x 5 =  $3^{2}$ x 5

72 = 2 x 2 x 2 x 3 x 3 = $2^{3}$ x $3^{2}$

The maximum number common between 18,45, and 72 is  $3^{2}$ = 9.

Hence, HCF ( 18, 45, 72 ) = 9.

∴ HCF of 18,45, 72 is 9.

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