What is the Least Common Multiple of 650 and 660?
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 650 and 660 is 42900.
LCM(650,660) = 42900
Least Common Multiple of 650 and 660 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 650 and 660, than apply into the LCM equation.
GCF(650,660) = 10
LCM(650,660) = ( 650 × 660) / 10
LCM(650,660) = 429000 / 10
LCM(650,660) = 42900
Least Common Multiple (LCM) of 650 and 660 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 650 and 660. First we will calculate the prime factors of 650 and 660.
Prime Factorization of 650
Prime factors of 650 are 2, 5, 13. Prime factorization of 650 in exponential form is:
650 = 21 × 52 × 131
Prime Factorization of 660
Prime factors of 660 are 2, 3, 5, 11. Prime factorization of 660 in exponential form is:
660 = 22 × 31 × 51 × 111
Now multiplying the highest exponent prime factors to calculate the LCM of 650 and 660.
LCM(650,660) = 22 × 52 × 131 × 31 × 111
LCM(650,660) = 42900
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