The GCF of two numbers is 3 and the lcm is 180 if one of the number is 45 what is the other number

Answer 1

Since:

GCF(a,b) ∙ LCM(a,b) = a ∙ b

a = 45

3 ∙ 180 = 45 ∙ b

540 = 45 b

b = 540 / 45 = 12

Answer 2

180 = 45*4 = 3^2 * 4 * 5
LCM(12,45) = 180