1. There are 16 cakes. Each cake is cut into 8 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 161 cups of tea yesterday. They drank 49 cups in the morning and 84 in the afternoon. How many did they drink in the evening?   3. Robin has a collection of 98 books. He donated 20 books last year and 28 books this year. How many books does he still have?   4. A school has 4 dining halls. Each dining hall has29 tables. If there are four children to each table, how many children stay for lunch?   5. Last month, Jack worked for 169 hours, Greg worked for 126 hours, and Edward worked 30 hours more than Jack. How many hours did they work altogether?