HCF & LCM

Question 1

How do you find the HCF of 50 & 70?

Answer 1

Factor tree of 50= 5 x 5 x 2
Factor tree of 70= 7 x 2 x 5
HCF= 2 x 5= 10

Question 2

How do you find the LCM of 50 & 70?

Answer 2

50= 2 x 5 x 5
70= 2 x 5 x 7
LCM= 2 x 5 x 5 x 7= 350