Problem 4. Three empty baskets for fruits are standing in a row. Dasha puts apples one by one into the baskets in the following order: first, second, third, second, first, second, third, second, first, and so on. She will stop when the second basket has 13 apples. In which of the two baskets, the first or the third, will there be more apples? The answer needs to be justified.

Answer: there will be more apples in the first basket.
Solution. Let's divide all of Dasha's actions into pairs as follows:

- she puts an apple in the first and second baskets;
- puts an apple in the third and second baskets;
- puts an apple in the first and second baskets;
- puts an apple in the third and second baskets;
- and so on

Each such pair of actions ends with Dasha putting an apple in the second basket. Thus, there will be exactly 13 pairs of actions. This means that the first basket will have 7 apples, and the second basket will have 6 apples.

## Criteria

1 6. Only the correct answer is provided.

4 6. The correct answer and justification are provided.

A "picture" showing how many apples ended up in each basket is considered as justification.