Question

Find the hcf and lcm of 6, 72 and 120, using the prime factorisation method.

Answer 1

Answer:

HCF =6

LCM =360

Step-by-step explanation:

6=2*3

72=3*3*2*2*2

120=2*2*2*3*5

THEREFORE ,

HCF (HIGHEST COMMON FACTOR)=2*3=6

LCM(LOWEST COMMON FACTOR)=2*2*2*3*3*5=360

Answer 2

Answer:

Step-by-step explanation:

6 = 2x3

72 = 36x2 = 18x2x2 = 3x3x2x2x2

120 = 6x2x5x2 = 3x2x2x5x2

Thus hcf= 3x2 = 6

And lcm = 3x3x2x2x2x5 = 360