LCM 21, and GCF =1
It's either GCF (Greatest Common Factor) or LCM (Least Common Multiple).GCF of 3 and 9 is 3, but seven only has 1 as a common factor with the other two, so GCF is 1.LCM of 3 & 9 is 9, and LCM of 9 and 7 is 7 x 9, so LCM is 63.
Of 7, 77 and 770:gcf is 7;lcm is 770.
The GCF is 210.. I believe..so nevermind.
GCF is 7 LCM is 588
LCM is 105. GCF is 1.
LCM = 70 GCF = 7
Lcm: 126 gcf: 7
Gcf=7 lcm=98
Gcf=3, lcm=9
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.
35 and 7, respectively.
GCF is 7. LCM is 420