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
Halim, Garret and Clement went shopping. Halim and Garret spent a total of $245. Halim and Clement spent $605 altogether. Clement spent 3 times as much as Garret.
Level 2
3 bowls of noodles and 1 plate of chicken rice cost $13. 4 bowls of noodles cost the same as 3 plates of chicken rice. How much does a bowl of noodles cost?
