Yes, but not evenly (16 with remainder 4).
1, 2, 4, 5, 10, 20, 25, 50, 100.
The HCF is 4
4
1, 2, 4.
1, 2 and 4.
1 and 5
LCM is the smallest number a number can go into. Since 4 multiplied by 5 is 20 and 20 is a multiple of 100 and 50 can go into that, along with the fact 20 can't go into 50 evenly, the least common multiple of 4 and 50 is 100.
1, 2 and 4.
1, 2, 4.
No. 100 divided by 12 is 8 with remainder 4.
The go into both 84 and 100 evenly: 1, 2, 4.