Counting Problems( Week 8 Evaluation) 1. How many internal angles in the following polygon? 2. A group of 17 students lined up. There are 12 students on the left of Tom. How many students are there on his right? 3. A few pieces of wood wii be connected to form a long piece. Each connection needs 4 nails. How many pieces will be connected if 32 nails are used? 4. A light, pulled the first time, turns on; pulled the second time, still on; pulled the third time, turns off; and then backs to on pulled the fourth times. George pulled 8 times, is the light on or off? 5. The buildings along one side of a certain street are numbered even numbers consecutively from 724 to 902. How many buildings are there in total along the side of the street? 6. Maple trees planted around a circular garden are one meter apart. How many maple trees will be planted if the circumference of the garden is 18 meters? 7. How many knots are needed to make in order to connect 19 short strings into one circular string? 8. A group of students lined up. Counting from left to right, Edward is the 6th in line; counting from right to left, Edward is the 5th. How many students are there in total?? 9. Larry has 3 more brothers than sisters. How many more brothers than sisters does his sister Mary have? 10. If it takes 5 minutes to cut a log into 6 pieces, how many minutes will it take to cut the log into 28 pieces? |