Question 464757
A: If we arrange the factors side by side:


22222 7 11
222 7 11 13


The highest number of 2's is 5, the highest number of 7's, 11's and 13's are 1 each. The LCM of K and L is therefore 2^5*7*11*13.


Try the others the same way. Another way to find the LCM is to think of it as taking the union of two sets; if we visualize K = {2,2,2,2,2,7,11} and L = {2,2,2,7,11,13} then the LCM is the union of the two sets, or {2,2,2,2,2,7,11,13} (elements in either K or L). It's not exactly the same as taking the union of the sets since the 2's are assumed to be distinct, but this method will work.