The least common multiple is the smallest number that is multiple of two or more numbers.
21: 21, 42, 63
63: 63
The LCM of 21 and 63 is 63.
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LCM OF 9,3 AND 21 IS 63. CHECK FOR YOURSELF IF YOU ARE NOT SURE.
The LCM is: 441
441
3 x 3 = 9 3 x 7 = 21 3 x 3 x 7 = 63, the LCM
The LCM (lowest common multiple) for 15 and 21 is 105. 15; 15, 30, 45, 60, 75, 90, 105, 120 21; 21, 42, 63, 84, 105, 126