Question

В турнире по шахматам учавствовали 6 учеников с 6-го по 11-й классы: Катя, Петя, Саша, Андрей, Наташа и Руслан. Все ученики были в разных классах. Определите, кто в каком классе учится,есди известно что: 1. В первом туре Саша выйграл у шестиклассника, Катя у семиклассника, а Наташа у девятиклассника 2.во втором туре Петя выйграл у семиклассника 3.В третьем и четвертом турах девятиклассник из за болезни не учавствовал в турнире, пожтому свободными от игры оказалаись Петя и Руслан 4.в четвертом туре Катя выйграла у одиннадцатиклассника 5.победителями турнира оказались Саша и Катя 6.хуже всех выступил девятиклассник

Answer 1

Ответ:

Катя в 8 классе,Петя в 6 классе,Саша в 11 классе, Андрей в 9 классе,Наташа в 10 классе,Руслан в 7 классе.

Объяснение:

Answer 2

Problem Analysis

We need to determine which student is in which class based on the given information about the chess tournament. The information provided includes the results of the matches between the students and some additional details about the tournament.

Solution

Let's analyze the given information step by step to determine which student is in which class.

1. In the first round, Sasha won against the student from the 6th grade, Katya won against the student from the 7th grade, and Natasha won against the student from the 9th grade. 2. In the second round, Petya won against the student from the 7th grade.

3. In the third and fourth rounds, the student from the 9th grade did not participate due to illness. Therefore, Petya and Ruslan were free from playing. 4. In the fourth round, Katya won against the student from the 11th grade.

5. The winners of the tournament were Sasha and Katya.

6. The student from the 9th grade performed the worst.

Based on this information, we can determine the class of each student:

- Sasha won against the student from the 6th grade in the first round. - Katya won against the student from the 7th grade in the first round and against the student from the 11th grade in the fourth round. - Natasha won against the student from the 9th grade in the first round. - Petya won against the student from the 7th grade in the second round. - Ruslan did not play in the tournament. - The student from the 9th grade performed the worst.

Therefore, we can conclude that: - Sasha is in the 6th grade. - Katya is in the 11th grade. - Natasha is in the 9th grade. - Petya is in the 7th grade. - Ruslan did not participate in the tournament.

Summary: - Sasha is in the 6th grade. - Katya is in the 11th grade. - Natasha is in the 9th grade. - Petya is in the 7th grade. - Ruslan did not participate in the tournament.

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