Question

Коля пригласил на свой день рожденья четверых друзей: Андрея, Диму, Максима и Рому. Все 5 мальчиков, включая Колю, Родились в 2006 году, но в разные месяца, в промежутке между 15 и 25 числом. Дима страше Андрея на 3 месяца, Но младше Масксима на 7 месяцев. Коля младше Ромы на 2 месяца, а Рома страше Димы на 5. В каком месяце родился Коля (Точно не в сентябре, я проверяла), если ни один из мальчиков не родился в декабре?

Answer 1

1) 5-2=3 (мес) разница между Колей и Димой
2) 7-5=2 (мес) разница между Максимом и Ромой.
Значит
Максим родился в январе,
Рома в марте,
Коля в мае,
Дима в августе,
Андрей в ноябре

Answer 2

Problem Analysis

We are given the following information: - Kolya invited four friends (Andrey, Dima, Maxim, and Roma) to his birthday party. - All five boys, including Kolya, were born in 2006 but in different months between the 15th and 25th of the month. - Dima is 3 months older than Andrey but 7 months younger than Maxim. - Kolya is 2 months younger than Roma, and Roma is 5 months older than Dima. - We need to determine in which month Kolya was born, excluding September.

Solution

To solve this problem, we can use a process of elimination by considering the given information and eliminating months that do not satisfy the given conditions.

Let's analyze the given information step by step:

1. All five boys were born in 2006, so we can exclude any months from other years.

2. None of the boys were born in December.

3. Dima is 3 months older than Andrey, but younger than Maxim by 7 months. This means that Dima's birth month must be 4 months after Maxim's birth month. Since Maxim cannot be born in December, we can exclude April as Dima's birth month.

4. Kolya is 2 months younger than Roma, and Roma is 5 months older than Dima. This means that Kolya's birth month must be 7 months after Dima's birth month. Since Dima cannot be born in April, we can exclude November as Kolya's birth month.

5. We are left with the following possible birth months for Kolya: January, February, March, May, June, July, August, and October.

6. Since none of the boys were born in September, we can exclude it as Kolya's birth month.

7. Therefore, the possible birth months for Kolya are: January, February, March, May, June, July, August, and October.

Based on the given information and the process of elimination, we cannot determine the exact birth month of Kolya. However, we have narrowed it down to the possible birth months mentioned above.

Note: It is important to note that the exact birth month of Kolya cannot be determined without additional information.