What is the highest common factor and lowest common multiple for the following pairs of numbers?
1) 8 and 12
2) 15 and 25
3) 18 and 24
4) 75 and 100
5) 22 and 66
6) 34 and 85
7) 28 and 36
8) 63 and 81
1) 8 and 12
2) 15 and 25
3) 18 and 24
4) 75 and 100
5) 22 and 66
6) 34 and 85
7) 28 and 36
8) 63 and 81