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1 and 9.
Any of its factors which are: 1 2 11 and 22
It is: 1
nothing
1 and 2.
1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 99, 198.
What goes into 22 and 100 evenly
It is: 11 and 1
HCF(9, 12) = 3
22 - 4 = 18 = 9 x 22 with 4 remaining
9.