Question

The least common multiple of 20, 24, and 45 is _____.



30

180

360

21,600

Answer 1

First, perform a prime factorization of each number.

Answer 2

idk prime factorization, how to do it

Answer 3

Multiple of 20 are 20,40,60,80,100,120,140,160,180,200,220,240,260,280,300, 320,340,360

Multiple of 24 are 24,48,72,96,120,144,168,192,216,240,264,288,312,336,360

Multiples of 45 are 45,90,135,180,225,270,315,360

Answer 4

And the only least common multiple common to all three is 360