Least Common Multiple of 91, 90, 21, 42

Least common multiple or lowest common denominator (lcd) can be calculated in three ways

• Least Common Multiple of 91, 90, 21, 42 by common division method
• Least Common Multiple of 91, 90, 21, 42 with GCF Formula

∴ So the LCM of the given numbers is 2 x 3 x 7 x 13 x 15 x 1 x 1 = 8190

The formula of LCM is LCM(a₁,a₂,a₃....,a_n) = ( a₁ × a₂ × a₃ × .... × a_n) / GCF(a₁,a₂,a₃....,a_n) x common factors(if more than 2 numbers have common factors).

We need to calculate greatest common factor of 91,90,21,42 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(91,90,21,42) = 1

common factors(in case of two or more numbers have common factors) = 882

GCF(91,90,21,42) x common factors =1 x 882 = 882

LCM(91,90,21,42) = ( 91 × 90 × 21 × 42 ) / 882

LCM(91,90,21,42) = 7223580 / 882

LCM(91,90,21,42) = 8190

∴ Least Common Multiple of 91,90,21,42 is 8190

Here are some samples of LCM of two or more Numbers calculations.

• LCM of 96, 82, 90, 80
• LCM of 10, 32, 82, 86
• LCM of 26, 79, 48, 13
• LCM of 45, 87, 19, 66
• LCM of 43, 23, 22, 25

1. What is the LCM of 91, 90, 21, 42?

Answer: LCM of 91, 90, 21, 42 is 8190.

2. What are the Factors of 8190?

Answer: Factors of 8190 are . There are integers that are factors of 8190

3. How to Find the LCM of 91, 90, 21, 42 ?

Least Common Multiple of 91, 90, 21, 42.

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors with last row quotient of common division that is LCM(91, 90, 21, 42) = 2 x 3 x 3 x 5 x 7 x 13 = 8190.