1. There are 24 cakes. Each cake is cut into 6 parts. Each part is further cut into 3 pieces. How many cake pieces are there in all?   2. The Professors at the State University drank 193 cups of tea yesterday. They drank 33 cups in the morning and 80 in the afternoon. How many did they drink in the evening?   3. Michael has a collection of 172 books. He donated 15 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 has35 tables. If there are four children to each table, how many children stay for lunch?   5. Last month, Jack worked for 176 hours, Greg worked for 126 hours, and Edward worked 22 hours more than Jack. How many hours did they work altogether?