1. There are 17 cakes. Each cake is cut into 10 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 245 cups of tea yesterday. They drank 94 cups in the morning and 69 in the afternoon. How many did they drink in the evening?   3. Gary has a collection of 104 books. He donated 16 books last year and 24 books this year. How many books does he still have?   4. A school has 3 dining halls. Each dining hall has22 tables. If there are four children to each table, how many children stay for lunch?   5. Last month, Jack worked for 172 hours, Greg worked for 140 hours, and Edward worked 28 hours more than Jack. How many hours did they work altogether?