You need at least two numbers to find a GCF.
The GCF of 340, 126 is 2.
The GCF is: 4
The GCF is 10.
It is: 10
The GCF/HCF of 340 and 408 is 68.
The GCF is 2.
1 and 340 respectively.
The GCF is 20.
The GCF is 20.
The GCF is 68.
The GCF is 34.
The factors of 288 are 1, 2, 3. 4, 8, 16, 18, 36, 72, 96, 144, 288. The factors of 340 are 1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340. The HCF (GCF) is 4.