Question

Find the LCM (156,140),If HCF (156,140)=4

Answer 1

product of LCM and HCF = product of two numbers

156 into 140 =4 into LCM
21840 = 4 into LCM
LCM = 5460.

Answer 2

HCF ( 156, 140) = 4
and
LCM OF 156 = 2*2*5*13
LCM OF 140 = 2* 2*5*7
LCM OF 156 and 140 = 2* 2*3*5*7*13 = 5460.
OR
=156*140/ 4
= 21840 / 4
=5460