Given Numbers are 15, 19

We can find the LCM of 15, 19 using the brute force method, prime factorization method, or GCD method.

To use brute force method, list the multiples of 15 and 19

Multiples of 15 =15,30,45,60,75,90,105,120,135,150,165,180,195,210,225,240,255,

Multiples of 19 =19,38,57,76,95,114,133,152,171,190,209,228,247,266,285,304,323,

Now, get the least common multiple of 15, 19 which is 285

So, the LCM of 15, 19 is 285.

One method for determining the LCM of 15 and 19 is to compare the prime factorization of each number. You can find the prime factorization for each number by following the instructions below:

Here is 15's prime factorization:

Prime factors of 15 are 3,5.

15 = 3¹×5¹

And this is 19's prime factorization:

Prime factors of 19 are 19.

19 = 19¹

When comparing the prime factorization of these two numbers, look for the highest power to which each prime factor is raised. In this case, the following primary factors must be considered: 3,5,19

3¹×5¹×19¹ = 285

This shows that the LCM of 15 and 19 is 285.

The first step in determining the Least Common Multiple of 15 and 19 is to generate a list of multiples for each number.

Lets look at the multiples of these two numbers, 15 and 19:

Lets look at the first ten multiples of these numbers, 15 and 19:

15,30,45,60,75,90,105,120,135,255 are the first ten multiples of 15.

19,38,57,76,95,114,133,152,171,323 are the first ten multiples of 19.

You can continue to list the multiples of these numbers until you find a match. Once you have found a match, or several matches, the Least Common Multiple is the smallest of these matches. The first matching multiple(s) of 15 and 19, for example, are 180, 255, and 304. 285 is the least common multiple since it is the smallest.

15 and 19 have an LCM of 285.

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15 and 19, than apply into the LCM equation.

GCF(15,19) = 1
LCM(15,19) = ( 15 × 19) / 1
LCM(15,19) = 285 / 1
LCM(15,19) = 285

1. What is the LCM of 15 and 19?

The LCM of 15 and 19 is 285.

2. How to find the lowest common multiple of 15 and 19?

To find the lowest common multiple of 15 and 19, we have to get the multip;es of both numbers and identify the least common multiple in them which is 285.

3. What are the Factors of 15?

Answer: Factors of 15 are 1, 3, 5, 15. There are 4 integers that are factors of 15. The greatest factor of 15 is 15.

4. What are the Factors of 19?

Answer: Factors of 19 are 1, 19. There are 2 integers that are factors of 19. The greatest factor of 19 is 19.

Answer:

Least Common Multiple of 15 and 19 = 285

Step 1: Find the prime factorization of 15

15 = 3 x 5

Step 2: Find the prime factorization of 19

19 = 19

Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

LCM = 285 = 3 x 5 x 19

Step 4: Therefore, the least common multiple of 15 and 19 is 285.