Counting Problems( Week 33 Evaluation) 1. There are 13 rungs on a ladder. Emily is on the 1st rung and John is on the 12th rung. How many steps is Emily apart from John? 2. A team T-shirts are numbered from 5 to 29 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 B? 3. 34 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 24 pieces. How many cuts need to be made? 5. If you write down the numbers from 24 to 50 inclusively. How many of them are even numbers? 6. A group of students lined up. There are 4 students ahead of Tom, and 8 students behind him. How many students are there together? 7. A group of students lined up. Counting from left to right, Susan is the 7th in line; counting from right to left, Susan is the 11th. 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 4 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? |