Answer: 6, 6, 15, 6, 15, 12, 3 , 15, 1
Step-by-step explanation: I have shown in the file two ways to calculate HCF. That's the answer from 1-9 above.
An example with number 6.
36= 12×3
24=12×2
60=12×5
HCF is 12. The highest number that can divide them all