Question

Find the lcm of 120 and 70 by fundamental theorem of arthimetic

Answer 1

1. 120=70.1+50
2. 70 = 50.1+20
3. 50 = 20.2+10
4. 20 = 10.2 +0
Hcf = 10

Hcf.LCM = product of two no.
10.LCM = 120. 70
LCM = 120. 70/10
LCM= 840.