Level 2
A library has a certain number of books. In January, the library bought 325 new books and 280 books were loaned out. In February, the library lost 350 books and loaned out 210 books, after which 2831 books were left. How many books were there in the library in the beginning of January?
Level 3
Risa and Isabelle had 856 stamps altogether. They decided to play a game. In the first round, Isabelle lost 58 stamps to Risa. In the second round, Risa lost 38 stamps to Isabelle. At the end of the two rounds, Isabelle had thrice as many stamps as Risa.
How many stamps did Risa have in the end?
How many stamps did Isabelle have at the beginning of the game?
Level 3
Jake puts 5 raisins in each of her cupcakes. After putting 5 raisins on the 7th cupcake, she had only 2 raisins left. How many raisins did she have at first?
Level 3
Tammy had 250 cm of ribbon. She used 180 cm of it to tie a present. She cut the rest of the ribbon equally into 10 shorter pieces. How long was each shorter piece of ribbon?
