14, 28, 42, 56, 70, 84, 98, 112, 126, 140, 154
20, 40, 60, 80, 100, 120, 140, 160
The LCM is 140.
At least two or more numbers are needed to find their LCM
If you use the "list the multiples" method of finding the LCM, it is likely that the lists and the size of the numbers on the list will increase as the numbers you are comparing get larger. If you learn the "prime factorization" method, you can avoid that.
need more than one number an LCM..
4, 8, 12, 16, 20, 24, 2814, 28
4, 8, 12, 16, 20, 24, 2814, 28
All numbers have multiples. Some numbers have some of the same multiples as other numbers. These are known as common multiples. On the list of common multiples, one number is the smallest. This is the least common multiple.
There can only be one LCM per set of numbers. Other common multiples will be multiples of the LCM. The LCM of 2840 and 144 is 51120. Other multiples include 102240 and 153360. The LCM of 28, 40 and 144 is 5040. Other multiples include 10080 and 15120.
Example: 5 and 7 List the multiples of 5. 5, 10, 15, 20, 25, 30, 35, 40... List the multiples of 7. 7, 14, 21, 28, 35, 42... The LCM is the first number that appears on both lists.
To find the GCF or the LCM of a set of numbers, it is sometimes practical to write out lists of the factors or multiples as the case may be and compare them. This is known as the listing method.
List the multiples of 324 and whatever the other number is. The first number that appears on both lists is the LCM.
All numbers have multiples. Some numbers have some of the same multiples as other numbers. These are known as common multiples. On the list of common multiples, one number is the smallest. This is the least common multiple.
To find the GCF or the LCM of a set of numbers, it is sometimes practical to write out lists of the factors or multiples as the case may be and compare them. This is known as the listing method.