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
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The least common multiple of 7 , 9 , 21 = 63
The Least Common Multiple (LCM) for 7 9 is 63.
The least common multiple of 7 , 8 , 9 = 504
The Least Common Multiple (LCM) for 7 9 8 6 is 504.
The smallest multiply of 7 divisible by 9 is the lowest common multiple of 7 and 9: lcm(7, 9) = 63.