the LCM is 63
The LCM is: 63
The LCM is 252.
3 x 3 = 9 3 x 7 = 21 3 x 3 x 7 = 63, the LCM
7 x 9 = 63 3 x 21 = 63 Therefore, the LCM of 9 and 21 is 63.
3 x 3 = 9 3 x 7 = 21 3 x 3 x 7 = 63, the LCM
3 x 3 = 9 3 x 7 = 21 3 x 3 x 7 = 63, the LCM
21 = 7 x 3 , 9 = 3 x 3 ; for the Least Common Multiple (LCM), 21 already is a multiple of 7. 21 & 9 have a common factor of 3, so LCM = 21 x 3 = 63
It's 126. -- the 6th multiple of 21 -- the 9th multiple of 14 -- the 14th multiple of 9
3, 7 and 9 7, 9 and 21
3 3| 9 21 18 3| 3 7 6 2| 1 7 2 7| 1 7 1 | 1 1 1 3*3*2*7 = 126 [Edited by lcm][james_cherming@hotmail.com]
The LCM of 9 and 21 is 63, which is the multiple of the highest power of prime factors from both numbers, is 63. (3² x 7 = 3 x 3 x 7 = 63).
The LCM is 63.