Locks for four garden sheds

We had a similar problem and found a set of 3 locks, with common keys, in one of the DIY sheds, I think Homebase as we had a voucher. They are Masterlock I think. They had sets with 4 in I believe.

I can?t recall how many keys we got, certainly enough for a spare and one for a neighbour to get into the garden gate if needed.

Quality seems OK. They?ve been outside a couple of years and haven?t rusted up etc.

you think there's a problem with 4 locks.

I have 96 4-digit padlocks to give to our studetns in the lab for their cupboards. when they are in groups of 5 they share one padlock, sometimes one memeber will decide to change the combination to make it easier to remember but forget to tell their fellow group members, so come to me saying the combination doesn't work. So in the past I've had to use bolt cutters on them. I have a large stash of padlocks that have been cut off.