There are 235 books in a library. On Tuesday, 227 books are taken out. On Thursday, 56 books are brought back and 35 books are taken out again on Friday. How many books are there now?
On Tuesday, 227 books were taken, so there are 235 - 227= <<235-227=8>>8 books left.
56 books were brought back on Thursday, so there are 8 + 56 = <<8+56=64>>64 books in the library.
Finally, 35 books are taken out on Friday, leaving 64 - 35 = <<29=29>>29 books available.
#### 29