1. Each class in a school has 31 students. If there are 10 classes, how many students are there in the school?   2. A school picnic costs $ 9 for each child. If there are 42 children in the class, how many dollars will the teacher collect?   3. If 46 children gave5flowers each to the teacher,how many flowers does the teacher have?   4. The Math teacher does6 sums everyday. After 105 days, how many sums has she done?   5. For a school day parade, students are arranged in 8 rows. There are 10 students in each row. How many total students are there in the parade?