1. There are 3 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 43 cups of tea yesterday. They drank 9 cups in the morning and 12 in the afternoon. How many did they drink in the evening?   3.   Adam   borrowed 8 books from the school library. He returned 2 books yesterday and 4 books today. How many books does he still have?   4. For her new kitchen, Mrs. Stacy bought a crockery set, a cutlery set and a pressure cooker. Each item cost $ 23 . How many dollars did she spend?   5. There are 4 paintings on each of three walls of a room. If an art gallery has 6 such rooms, how many paintings are there in its collection?