Well i think that you could have 3.
Depends on if they like each other or not.
6 kids per room
There are no laws regarding sharing a room.
with his wive
Probably means that there are 2 twin beds in the room.
Probably sharing a hotel room
No
Evenly.
If you have to share a room with your younger sibling try to move the furniture around to make more space. Try not to fight with your younger brother or sister because then it will not be much fun sharing a room with them. Be nice to eachother so sharing a room will be fun. Think of the positives about sharing a room with a younger sibling, you don't have to sleep in a room by yourself and you always have someone to talk to.
A lot depends on how old the kids are. There are many illustrated books on this in large libraries
how many people in my family
no
Basically there are multiple meanings of Twin-Sharing Room a) Twin Sharing Rooms comes with 2 types of bed combinations; 2 single Beds or 2 double beds. B) Many Airlines Holiday Packages also offer Twin Sharing: where double the price of the room is charged for single person, or if two person's travel the price would be half person.