Counting Problems( Week 33 Evaluation) 1. There are 13 rungs on a ladder. Josh is on the 3rd rung and Hillary is on the 5th rung. How many steps is Josh apart from Hillary? 2. A team T-shirts are numbered from 5 to 30 consecutively. All the even number T-shirts are assigned to group A and all the odd number T-shirts are assigned to group B. How many people are there in group A? 3. 35 boys stand in a line. There is a girl between each pair of boys. How many girls are there in the line? 4. Cut a strip of wire into 22 pieces. How many cuts need to be made? 5. If you write down the numbers from 32 to 61 inclusively. How many of them are odd numbers? 6. A group of students lined up. There are 9 students ahead of Andy, and 4 students behind him. How many students are there together? 7. A group of students lined up. Counting from left to right, Julia is the 8th in line; counting from right to left, Julia is the 3rd. How many students are there in total? 8. How many triangles can you count in the figure below?
9. There are 3 sisters in a family and each of them has 2 brothers and 2 sisters. How many kids are there in this family? 10. How many different line segments can you count in the following figure? |