find the least common mutlipe of 420 196
Break down each number into prime number factors
196 = 2*2*7*7
420 = 70*2*3 = 2*2*3*5*7
The least common multiple is the product of all prime factors that occur in both numbers
2*2*3*5*7*7 = 2940
20,40,80
To find the least common multiple (LCM) of two numbers, you need to break down each number into its prime number factors.
Start by breaking down 196 and 420 into their prime factors:
196 can be broken down into 2 * 2 * 7 * 7
420 can be broken down into 2 * 2 * 3 * 5 * 7
The LCM is the product of all prime factors that occur in both numbers. In this case, the common prime factors are 2, 2, 7, and 7.
Now, multiply these common prime factors together:
2 * 2 * 7 * 7 = 196
Therefore, the LCM of 420 and 196 is 196.