The LCM is: 7
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If you mean 7 and 13 then the LCM is 91
56Prime Factorization of:7 = 1 * 78 = 1……..* 8========LCM=....7* 8 = 56
3=3*1 7=7*1 21=3*7 LCM=(3*7)=(21*1)=21
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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]