Level 3
Jelly has some cookies. She gives 512 of the cookies to her roommate and eats 612 of the cookies. What fraction of the cookies does she have left?
Level 3
There were some pupils in a museum. 13 of the pupils lined up in 16 short rows and 12 of the pupils lined up in 6 long rows. The remaining pupils did not line up. There are 12 more pupils in each long row than each short row.