read it and find out
the bible
They didn't read. The bible wasn't printed until 1443 and most people, including nuns, couldn't read.
900,365,670 nuns
There were many convents of Dominican nuns in Italy during the 16th century.
What loss of nuns?!? Nuns outnumber monks in many east Asian communities, such as Taiwan, and among Western Buddhists. In Theravada countries there have not been fully ordained nuns until recent times, so it is fair to say that the number of nuns is growing there, not shrinking.
Nuns are typically allowed to have a few personal possessions, which usually include basic clothing, a Bible, prayer books, and personal items necessary for daily living. The specific rules can vary by religious order, but many nuns live a life of simplicity and poverty, often sharing communal resources. Generally, they do not own personal property in the same way that laypeople do, as their focus is on their spiritual commitments and community life.
No, nuns do not have to cut their hair as part of their religious practices. Many nuns choose to keep their hair long as a symbol of their dedication to God and their religious vows.
They are supposed to wear habits, but many choose not to.
There are many Marys who were nuns. Please be specific.
Other nuns
All nuns started out as cloistered, that is the very definition of a nun, as opposed to a Sister. A Sister works out in the world, classically, teaching, nursing, etc. Nuns, such as Benedictines, Cistercians, Carthusians, were all cloistered, although many, not all, modern Benedictine nuns work out in the world like Sisters. (Cloistered is the term for an "enclosed Order". Classically, Carmelites, Visitation Sisters, Franciscans, Dominicans, and many others were cloistered as well, but they are not nuns.
Monks and nuns do the monks' and nuns' jobs now.