At the bookstore, Sarah bought 6 paperback books and 4 hardback books. Her brother bought one-third as many paperback books as Sarah bought, and two times the number of hardback books that she bought. How many books did her brother buy in total?
How many paperbacks did her brother buy? ** Her brother bought 6/3=<<6/3=2>>2 paperbacks
How many hardbacks did her brother buy? ** He bought 4*2=<<4*2=8>>8 hardbacks
How many books did her brother buy in total? ** In total he bought 2+8=<<2+8=10>>10 books
#### 10