a) 3528:4=882 rest 0
2061:3=687 rest 0
4320:2=2160 rest 0
5030:5=1006 rest 0
b)5274:4=1318 rest 5
6035:6=1005 rest 8
8209:4=2052 rest 2
4716:5=943 rest 2
c)6121:8=765 rest 1
5326:3=1775 rest 3
4808:8=601 rest 0
7909:9=878 rest 7
d)5127:3=1709 rest 0
3257:8=407 rest 1
2534:5=506 rest 8
4507:8=563 rest 3