Question

HALF YEARLY EXAMINATION 2020 – 2021
CLASS X
TIME: 1 HOUR
MATHEMATICS
MM: 30
1. Find the HCF and LCM of 6, 72 and 120, using the prime factorisation
method
(2)​

Answer 1

Answer:

HCF = 6 LCM = 360

Step-by-step explanation:

HCF of

• 6 , 72, 120
• 3 , 36 , 60

• 1 , 12 , 20

HCF = 6

LCM of

• 6 , 72 , 120
• 3 , 36 , 60
• 1 , 12 , 20
• 1 , 6 , 10
• 1 , 3 , 5
• 1 , 1 , 5
• 1 , 1 , 1

Answer = 360

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