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2 x 3 x 3 = 18

3 x 7 = 21

2 x 3 x 3 x 7 = 126, the LCM

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It is: 72

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Q: What is the LCM of 18 21 use prime factorizations?
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What is the least common multiple of 18 5 and 10?

The prime factorizations are: 5 3 * 3 * 2 2 * 5 Eliminating the common factors, we get 3 * 3 * 2 * 5 Simplifying gives us 90 The LCM of 5, 18, and 10 is 90.


What is the least common multiple of 18 13 and 9?

Since 13 is a prime number, and 18 is the LCM of 9 and 18, then 13*18 = 234 is the LCM of 13, 9, and 18.


What is the greatest common factor of 12 18 and 28?

The greatest common factor of 12, 18, and 28 is 2.The prime factorization of 12 is 2*2*3The prime factorization of 18 is 2*3*3The prime factorization of 28 is 2*2*7So the greatest common factor of the set is 2.


What is the least common multiple of 6 18 and 27?

If you want to find the LCM of two numbers, you first need to break those numbers down into their prime factors: 27=3x3x3 18=3x3x2 The next step is to discard the duplicate entries of any common prime factors. In this case, both numbers have two 3s in their prime factors, so we can discard 2 of these, leaving us with 3,3,3 and 2. Multiply all these together for the LCM: 3x3x3x2 = 54 So the lowest common multiple of 27 and 18 is 54.


What is the LCM of 36 17 and 35?

To find the LCM of three numbers you first have to break them down into their prime factors. In this case: 27 = 3x3x3 18 = 2x3x3 10 = 2x5 The next step is to identify any duplicates and cross them out. In this case two numbers share two 3s as prime factors, and two numbers share a 2 as prime factor. That leaves us with 3, 3, 3, 2 and 5 as the prime factors to work with. Multiplying these together gives 270, and so the LCM of 27, 18 and 10 is 270.

Related questions

What is the LCM of a pair of numbers whose prime factorizations are 2x2x3x5 and 2x3x3?

The LCM of 60 and 18 is 180


What is the least common multiple of 18 5 and 10?

The prime factorizations are: 5 3 * 3 * 2 2 * 5 Eliminating the common factors, we get 3 * 3 * 2 * 5 Simplifying gives us 90 The LCM of 5, 18, and 10 is 90.


What are the prime factorizations of 18 27 and 90?

The prime factorization of 18 is 2*3*3 The prime factorization of 27 is 3*3*3 The prime factorization of 90 is 2*3*3*5


Lcm of 18 and 24 using prime factorization?

18 in pime exponents is 2*32 24 in prime exponents is 23*3 LCM: 23*32 = 72


What is the LCM of 18 and 48 using prime factorization?

It is: 144


What is the LCM of 18 and 29?

since 29 is a prime simply 18*29=522


What is the LCM of 18 20 and 30?

To find the lowest common multiple for numbers, prime factor each the use each prime number the number of times it appeared the most in each number. 18=2x3x3 20=2x2x5 30=2x3x5 lcm=2x2x3x3x5=180


What is the least common multiple of 18 13 and 9?

Since 13 is a prime number, and 18 is the LCM of 9 and 18, then 13*18 = 234 is the LCM of 13, 9, and 18.


How do you calculate the LCM of 18 24 and 42?

prime factors of 18 are 2 and 32 prime factors of 24 are 23 and 3 prime factors of 42 are 2, 3 and 7 LCM = 23*32*7 = 504


What is the least common multiple of 13 and 18?

13 is a prime number and thus the the LCM of 13 and any number is 13 times that number. The LCM is: 234


What is the greatest common factor of 12 18 and 28?

The greatest common factor of 12, 18, and 28 is 2.The prime factorization of 12 is 2*2*3The prime factorization of 18 is 2*3*3The prime factorization of 28 is 2*2*7So the greatest common factor of the set is 2.


What is the LCM of 18 and 42 using prime factorization?

It is: 32*25 = 288