you can use the ladder. But only with two numbers. If its more than 3 numbers you will have to factorize it, or list the prime #'s. (if you don't know what the ladder is, ask your math teacher. If your teacher doesn't know, ask a parent/gurdian, if they dont know than your left with the choice of googling it.)
You need at least two.
Example: 30 and 42
Factor them.
2 x 3 x 5 = 30
2 x 3 x 7 = 42
Select the highest amount of each factor.
2 x 3 x 5 x 7 = 210, the LCM
Example: 30 and 42
Factor them.
2 x 3 x 5 = 30
2 x 3 x 7 = 42
Combine the factors, eliminating duplicates.
2 x 3 x 5 x 7 = 210, the LCM
Example: 30 and 42
List the multiples.
30, 60, 90, 120, 150, 180, 210, 240
42, 84, 126, 168, 210, 252
The LCM is 210.
Their least common multiple is 28
The least common factor of 10 and 25 is: 1. The HIGHEST common factor is 5, and the least common MULTIPLE is 50.
When you are finding common factors, one method is to list the factors.
the answer 63You just list all the multiples of each7 - 7, 14, 21, 28, 35, 42, 49, 54, 63, 70, ...63 - 63, 126, 189, 252, ...
The traditional method is to list the multiples of each number and pick the smallest multiple they have in common. This can be very tasking for large numbers. The traditional solution is shown below: [Method 1] Steps: 1. List the multiples of each number: 28 - 28, 56, 84, 112, 140... 42 - 42, 84, 126, 168, 210... 2. Pick the smallest multiple they have in common which in this case is 84. If there are no common multiples, continue listing multiples until a common multiple is produced. [Method 2 - Prime factorization Method] Steps: 1. Find the prime factorization of each number. 28 - 2*2*7 42 - 2*3*7 2. Circle the prime factors they have in common one pair at a time. One pair of twos and one pair of sevens. The other 2 and 3 remain uncircled. 3. Multiply one number from each of the pairs by each of the uncircled prime factors remaining to get the LCM (least common multiple). 2*7*2*3 = 84
The "least" common multiple of 12 and 18 will be 36.
to find the least common multiple of two numbers you must list the factors then you can find out their least common multiple of the two numbers
The least common multiple of 45 , 81 = 405
Their least common multiple is 28
The one with 420 on it.
The least common multiple of the numbers 8 and 22 is 88.
18 is a multiple of 9. To be an LCM, it has to be compared to another list of multiples.
That's the least common multiple, or LCM.
The least common factor of 10 and 25 is: 1. The HIGHEST common factor is 5, and the least common MULTIPLE is 50.
When you are finding common factors, one method is to list the factors.
The least common multiple of the numbers 350 and 140 is 700.
The least common multiple of the numbers 20 and 50 is 100.