1. There are 25 cakes. Each cake is cut into 6 parts. Each part is further cut into 2 pieces. How many cake pieces are there in all?   2. The Professors at the State University drank 244 cups of tea yesterday. They drank 99 cups in the morning and 69 in the afternoon. How many did they drink in the evening?   3. Gary has a collection of 116 books. He donated 17 books last year and 29 books this year. How many books does he still have?   4. A school has 5 dining halls. Each dining hall has16 tables. If there are four children to each table, how many children stay for lunch?   5. Last month, Jack worked for 166 hours, Greg worked for 158 hours, and Edward worked 35 hours more than Jack. How many hours did they work altogether?