Problem 7.1. In class 7 "B", there are more than 3 but less than 15 children. On New Year's, Santa Claus came to them with a bag containing 195 candies. After distributing the candies equally among all the children in the class, Santa Claus found that there were 8 candies left in the bag. How many candies did each child receive?
Answer: 17.

Solution. The children received $195-8=187=11 \cdot 17$ candies. This number must be divisible by the number of children in the class, which is more than 3 and less than 15. Therefore, there are 11 children in the class, and each of them received $187: 11=17$ candies.