The hcf is 9
1, 3 and 9 will go into both numbers evenly
72 does not go into 101 evenly.
36, 72, 108, 144 and the rest of the multiples of 36
Yes, because 72 can go into 72 evenly.
Not evenly.
Any element of the set of numbers of the form 72*k, where k is an integer, is evenly divisible.
The hcf of 60 and 72 is 12
2.
42 will not divide evenly into 72. You an divide 42 into 72 but there will be a fraction.
Any multiple of 72.
9