The answer is 49.
49/84 :D
The GCF of 21, 49, and 84 is 7.
The GCF is 7.
seven 84/12 = 7 = 49/7
The GCF is 7.7 is the GCF of 42, 49 and 84.
For 84, 49, 28 the LCM is: 588
The GCF is 1.
7
For 105, 84, 70, 49 the LCM is: 2,940
The LCM is 588.
7. 7x7=49. 7x11=77. 7x12=84.