Both of these numbers are divisible by 3 and 7. The factors of 105 is 21 x 5 and that of 147 is 21 x 7. So the LCM is 21 x 35 = 735.
Since 147 is a multiple of 21, it is automatically the LCM.
The LCM is 441.
The LCM is 147.
The greatest common factor of 105 and 147 is 21
147
147
The LCM is 105.
The LCM is: 105
The LCM is: 147
Since 147 is a multiple of 21, it is automatically the LCM.
189 = 3 x 3 x 3 x 7; 105 = 3 x 5 x 7. Common factors are 3 and 7 so LCM = product /HCF ie 189 x 105/21 = 945