The LCM is 28.
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The Least Common Multiple (L.C.M.) of two numbers is the lowest number that can be divided both. The least common multiple of 28 and 4 is 4.
The definition of least common multiple is the lowest number that is the product of all of the numbers in a set when multiplied by an integer. In this case, the least common multiple is 28; this is because 7*4= 28, 4*7=28, and 14*2=28. There is not a lower number into which these three numbers can all be evenly multiplied into.
The LCM is: 28
28
LCM(7, 4) = 28.