1. Each section in a class has 7 students. If there are 6 sections, how many students are there in the class?   2. A class picnic is estimated to cost $ 80 . If there are 10 children in the class, how many dollars should each child contribute?   3. If 30 children in a class are to be assigned 5 Science projects, how many children should work on each project?   4. The Math teacher does 5 sums everyday. After 7 days, how many sums has she done?   5. For a school day parade, there are 4 rows with 5 boys in each row and 5 rows with 7 girls in each row. How many total students are there in the parade?