Предмет: Математика, автор: akopyan19459

В углах квадрата написаны числа 1,2,3,4 в некотором порядке. Некоторое количество таких квадратов сложили в стопку и подсчитали суммы чисел в каждом углу стопки. Могли все 4 суммы оказаться равными 2012?

Ответы

Автор ответа: alen4ik555
0
Сумма чисел в вершинах каждого отдельного треугольника равна 1+2+3=6. То есть, сколько бы мы ни взяли треугольников, общая сумма всех чисел в стопке будет равна какому-то числу, кратному 6. Если бы в каждом углу сумма была равна 55, то общая сумма была бы 55*3 = 165. Поскольку 165 не делится на 6, значит, такой случай невозможен.Ответ: нет.
Похожие вопросы
Предмет: Математика, автор: salamatinv311
Предмет: Биология, автор: sabi0000
Предмет: Английский язык, автор: Аноним
Travelling

Modern life is impossible without travelling. Thousands of people travel every day either on business or for pleasure. They can travel by air, by rail, by sea or by road.

Of course, travelling by air is the fastest and the most convenient way, but it is the most expensive too. Travelling by train is slower than by plane, but it has its advantages. You can see much more interesting places of the country you are travelling through.

Modern trains have very comfortable seats. There are also sleeping cars and dining cars which make even the longest journey enjoyable. Speed, comfort and safety are the main advantages of trains and planes. That is why many people prefer them to all other means.

Travelling by sea is very popular. Large ships and small river boats can visit foreign countries and different places of interest within their own country.

As for me, I prefer travelling by car. I think it's very convenient. You needn't reserve tour tickets. You needn't carry heavy suitcases. You can stop wherever you wish, and spend at any place as much time as you like.

Every year my friend and I go somewhere to the South for holidays. The Black Sea is one of the most wonderful places which attracts holiday-makers all over the world. There are many rest-homes, sanatoriums and tourist camps there.

Part 1.Read the article again and give answers to the questions. Write no more than THREE WORDS or A NUMBER.

Example: What travelling is slower than by plane ? train

1. How many people travel every day ? __________ [1]

2. Which travelling is most expensive? __________ [1]

3. In what transport you can visit foreign countries ? __________ [1]

4. By what transport many people prefer travelling ? __________ [1]

Part 2.Read definition of the word from the text. Write it in the given place.

5. have very comfortable seats ________________________ [1]

6. one of the most wonderful places which attracts holiday-makers all over the world. _______________________________________ [1]

Total [6].

II. Writing

Task.Choose one of the topics below.

Topic 1.Read the beginning of the story and create your continuation.

Last month I travelled to Astana . When I came to Astana . I realized that I had some problems …..

You may use this plan for the answer:

What were the problems? ___________________________________________________________________

______________________________________________________________________

How did you solve them?

______________________________________________________________________

______________________________________________________________________

Describe the end

______________________________________________________________________

______________________________________________________________________

Topic 2. Read the beginning of the story and create your continuation.

Arman and Asem were on board of the spaceship, the destination of which was Mars. Suddenly Arman looked out of the window and noticed something big with lots of flashing lights coming towards their ship. The ship’s radio began to make noise and everybody was waiting for something to happen. Then a little window at the end of the ship opened and a small green creature appeared as if it was waiting outside. “An alien!” – Arman shouted but people didn’t hear him…

You may use this plan for the answer:

What happened next? __________________________________________________

_____________________________________________________________________

_____________________________________________________________________

What did Аrman decide to do? ______________________________________________

_____________________________________________________________________

_____________________________________________________________________

Describe the end_______________________________________________________

_____________________________________________________________________

_____________________________________________________________________

умоляюю помагите срочно