Prime Factors HCF and LCM

1
Prime Factors HCF and LCM
2
Express the following as the sum of two prime
numbers a. 12 b. 25

• 5 7 12
• 23 2 25

3
Express 108 as a product of its prime factors
108
54
2
6
9
3
3
2
3
2 x 2 x 3 x 3 x 3 108
4
Find the HCM (Highest Common Factor) and LCF
(Lowest Common Multiple) of 30 and 80.
Prime Factors of 30 2 x 3 x 5 Prime Factors of
80 2 x 2 x 2 x 2 x 5 HCF is 2 x 5 10 LCM is 2
x 5 x 2 x 2 x 2 x 3 240