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What is the Least Common Multiple of 5 and 12?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least common multiple (LCM) of 5 and 12 is 60.

LCM(5,12) = 60

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Least Common Multiple of 5 and 12 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 5 and 12, than apply into the LCM equation.

GCF(5,12) = 1
LCM(5,12) = ( 5 × 12) / 1
LCM(5,12) = 60 / 1
LCM(5,12) = 60

Least Common Multiple (LCM) of 5 and 12 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 5 and 12. First we will calculate the prime factors of 5 and 12.

Prime Factorization of 5

Prime factors of 5 are 5. Prime factorization of 5 in exponential form is:

5 = 51

Prime Factorization of 12

Prime factors of 12 are 2, 3. Prime factorization of 12 in exponential form is:

12 = 22 × 31

Now multiplying the highest exponent prime factors to calculate the LCM of 5 and 12.

LCM(5,12) = 51 × 22 × 31
LCM(5,12) = 60

Recent Comments
Guest 2019-11-05 16:51:16

this was a cool hard app

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