Factor them.
7
2 x 7
5 x 7
Combine the factors, eliminating duplicates.
2 x 5 x 7 = 70, the LCM
LCM(35, 7, 14) = 70.
70
Since 14 is a multiple of 7, it is automatically the LCM.
LCM = 70 GCF = 7
The LCM is: 14
The GCF is: 7
First we will find LCM for first two numbers (28 and 35).Step 1: Find the GCD (Greatest Common Divisor) of 28 and 35 which is 7.Step 2: Multiply the numbers 28 and 35 together (28 * 35 = 980)Step 3: Divide the 980 with 7. (980/7 = 140)So, the LCM of 28 and 35 is 140.Now we will find the LCM of above result (140) and third number (21) using the same procedure.The LCM of 28, 35 and 21 is 420.
You need at least two numbers to find an LCM. If that's 7 and 35, the LCM is 35.
The LCM of 14 and 35 is 70, which is the multiple of the combined prime factors of both numbers (2 x 5 x 7).
The LCM is 35.
35 and 7, respectively.
7 and 70 14 and 35