Question

find the LCM of 20 and 30... what is the LCM anyways?

Answer 1

least common multiple. 60 is the LCM of 20 and 30, because it is the smallest number that is an even multiple of both of them.

Answer 2

thank you

Answer 3

LCM = (num1 * num2) / GCD (num1,num2)
But this doesn't tell you what LCM means
Take the unique prime factors of num1 and num2 together multiply them.
This formula just gives a way to get that number directly

For example, 20*30/GCD(20,30) = 20*30/10 = 2*30 = 60.

Factors of 20 = 2^2*5
Factors of 30 = 2*3*5

Factors in common (GCD): 2,5
Other factors: 2,3
All unique factors: 2,2,3,5. Their product is 2*2*3*5 = 60