To make this easier, let's first factor 18 and 21 into their prime factors:
18=2*3^2
21=3*7
Now it's very easy to find the LCM and GCF. The LCM is 2*3^2*7=126, and the GCF is 3.
The GCF is 3. The LCM is 252.
The gcf and LCM of 21 and 26 are 1 and 546 respectively
LCM 21, and GCF =1
The GCF of 10 & 18 is 2.The LCM of 10 & 18 is 90.
LCM(12, 18, 24) = 72; GCF(12, 18, 24) = 6.
The LCM is 90. The GCF is 9.
GCF of 18 and 360 is 18 LCM of 18 and 360 is 360
The GCF is 6. The LCM is 360.
The GCF is 3.
The GCF is 9.
The LCM of 6 and 21 is 42. Their GCF is 3.
The LCM of these numbers is 18. LCM is Least Common Multiple. The GCF of these numbers is 6. GCF is Greatest Common Factor.