why did the jews have to remember the number on their wrist while they were in the concentration camps?

Livy Bishop: why did the jews have to remember the number on their wrist while they were in the concentration camps?
i am reading the book ‘Devil’s Arithmetic” and the tattooer said to hannah remember her number

Answers and Views:

Answer by cjvw622
Because the number became their identity. No one had a name in the camps. There were too many to remember, and it was part of the depersonalization strategy. It’s harder to kill someone if you know them as a person. They were called by their numbers and if they were asked a question they had to answer with their number first.

Answer by ♥ music ♥
Their number was their name.

Answer by Satans Pig
It entitled them to a free upsizing at McDonalds