The GCF for a pair of numbers is 18, and the LCM is 180. If one of the numbers is 90, what is the other number?

Guest Jun 27, 2020

#1**0 **

LCM of 180 and 18 = 180

GCD of 180 and 18 = 18

**LCM of 90 and 36 = 180 GCD of 90 and 36 = 18 LCM of 36 and 90 = 180 GCD of 36 and 90 = 18**

LCM of 18 and 180 = 180

GCD of 18 and 180 = 18

Guest Jun 27, 2020

#2**+1 **

Let m and n be the two numbers. We already know one of them is 90.

mn=gcd(m, n) * lcm[m, n]

90n=gcd(90, n)* lcm[90, n]

90n=18 * 180

90n = 3240

n = **36**

gwenspooner85 Jun 27, 2020