There are an infinite list of numbers that "go into" 36.
The positive whole numbers that go into 36 evenly (the "factors") are:
1, 2, 3, 4, 6, 9, 12, 18, and 36.
3 goes into 36 and 63 evenly.
2 is one such number.
4
1
Because 2 goes into 36 without remainder. 36 = 2*18
That number is 9.
6
Their HCF is 2
One and three
Their HCF is 2
GCF(36, 75) = 3 so the answer is 1 and 3
Its 12. To do this you see what number goes into 36 three times