15 and 90
5 and 75 15 and 25
3 and 90 15 and 18
The LCM of 15 and 20 is 60. The GCF is 5.
The GCF is 1. The LCM is 195.
GCF = 15LCM = 150The LCM is 150. The GCF is 15.150 and 15, respectively.
5 and 75 15 and 25
In these types of problems, the numbers can also be the answer. 3 and 30 have a GCF of 3 and an LCM of 30. Since the product of the GCF and LCM of two numbers is the same as the product of the numbers, you could also use another factor pair of 90, like 6 and 15.
15 and 60, respectively.
This doesn't work. The LCM of a pair of numbers has to be equal to or larger than the largest number of the pair. If one of the numbers is 60, the other is 120. 60 and 120 have a GCF of 60, not an LCM.
75 = 3*5*5, so the first pair that comes to mind is 3*5 and 5*5.LCM(15, 25) = 75.And it conveniently happens to be that GCD*(15, 25) = 5.So {15, 25} is the answer (at least an answer).*GCD is "Greatest Common Divisor" and a more official way of saying GCF.* * * * *Yes, it is an answer.Consider LCM/GCF = 75/5 = 15If p and q are any two coprime factors of LCM/GCF = 15, then p*GCF and q*GCF will be an answer.The above answer used p = 3 and q = 5.The other possible pair is p = 1 and q = 15 which gives the pair as 5 and 75.
The general rule is that the product of the LCM and the GCF is equal to the product of the original two numbers. That would make the answer 20. Lets overlook the fact that two numbers with a GCF of 15 and an LCM of 20 don't exist.
Their LCM is 2700/(15^2) = 180.
3 and 90 15 and 18
2 and 15
15 and 270 do.
They are: gcf = 15 and LCM = 30
Gcf - 5 lcm - 30