# Math

GCF of 2 natural numbers is 3 and their LCM is 180 if one of the numbers is 45 then find second number

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1. Number property:
The product of the two numbers = (GCF)*(LCM)
So if the 2nd number is x
45x = 3(180)
x = 12

check: 12 and 45
12 = 2*2*3
45 = 3*3*5
So the LCF = 3
So the LCM = 2*2*3*3*5 = 180

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