6.2. A person has less than 1 Ruble (the currency unit of Russia, 1 Ruble = 100 Kopecks). He buys 5 pieces of candy, leaving 4 Kopecks; buys 6 pencils, leaving 3 Kopecks; buys 7 exercise books, leaving 1 Kopeck. Please answer: How much does each piece of candy cost? How much money does the person have in total? Try to provide all possible answers.
6.2. The person has a total of 99 kopecks, and each piece of candy costs 19 kopecks.
We can reason as follows:
If we take out 9 kopecks from the person's money, the remaining amount can be divided by 5 and by 6, therefore, it can be divided by 30. Thus, the total amount of money can only be 39, 69, or 99 kopecks, and we can check each one individually.