Среди 79 монет имеется 1 фальшивая (более легкая) монета. Как ее найти, используя не более 4 - Дата: 13.11.2019, Автор: cubbywong

Среди 79 монет имеется 1 фальшивая (более легкая) монета. Как ее найти, используя не более 4 взвешиваний?
- Предмет:
  Математика
- Автор:
  cubbywong
- 5 лет назад

Ответы 1

Разделить на 3 части по 27монет, взвесить любые 2 кучки, если одна более лёгкая, то монета там, а если весы в равновесии, то монета в третьей части. Аналогично, выбранную кучку делим на три части по 9 монет, потом по 3 монеты, и за 4 взвешивания нужная монета найдена.
- Автор:
  zaracydh
- 5 лет назад
- 0
Добавить свой ответ

Еще вопросы

Как проверить букву ш в слове голубушка
- Предмет:
  Русский язык
- Автор:
  woods
- 5 лет назад
- Ответов:
  
  1
- Смотреть
СИСТЕМА УРАВНЕНИЙ. ПОЖАЛУЙСТА, ОЧЕНЬ СРОЧНО НУЖНО!

x^2 + xy = 7
(x+y)^3 = - 8
- Предмет:
  Алгебра
- Автор:
  trixieelvi
- 5 лет назад
- Ответов:
  
  1
- Смотреть
ПОМОГИТЕ, ПОЖАЛУЙСТА, СДЕЛАТЬ ТЕСТ ПО АНГЛИЙСКОМУ ЯЗЫКУ
VIII. Выберите соответствующую форму глагола во времени Simple (Present, Past or Future)
1. Children always … a lot of questions.
a. ask b. asks c. asking
2. I usually … on Friday nights.
a. goes out b. go out c. will go out
3. We … a wonderful time in London last week.
a. has b. having c. had
4. He … a new job next Tuesday.
a. start b. started c. will start
5. Last year they … to Moscow.
a. Moves b. moved c. will move
IX. Выберите личное, притяжательное или объектное местоимение.
1. 1. Why did you ask … to come? I don’t like ….
a. she / her b. her / her c. her /she
2. Can you help … with this task?
a. me b. I c. My
3. We usually see … at the weekend.
a. they b. them c. their
4. How did you teach … to read?
a. he b. his c. him
5. …. like her new car, but ….. doesn’t like mine.
a. I / she b. I / her c. me / she
6. …. would like to go to the cinema tonight, would you like to join …?
a. we / us b. we / our c. we / we
7. We met yesterday and talked a lot about …. new job and … new boyfriend.
a. my / she b. my / her c. me / she
X. Выберите соответствующую форму прилагательного в сравнительной или превосходной степени сравнения.
1. The Everest is … mountain on Earth.
a. high b. the highest c. higher
2. Eurasia is … continent.
a. bigger b. biggest c. the biggest
3. Summer is usually … than spring.
a. hotter b. the hotter c. the hottest
4. Chinese is … than English.
a. more difficult b. difficult c. the most difficult
5. February is … month.
a. short b. the shorter c. the shortest
6. She is … than me.
a. more intelligent b. intelligent c. the most intelligent
7. Your story is … than mine.
a. more exciting b. the most exciting c. exciting
8. You have a … life than I have.
a. busier b. busy c. the busiest
XI. Выберите правильный перевод.
1. I have got as many friends as you’ve got.
a. больше друзей b. столько же друзей
c. много друзей
2. My car is not as fast as yours.
a. не такая быстрая как b. такая же быстрая как
c. быстрее
3. The more you work, the more money you get.
a. чем больше, тем больше b. все больше, и больше
c. много, много
4. The less we know, the less we forget.
a. чем меньше, тем меньше b. все меньше, и меньше c. мало, мало
XII. Прочитайте текст и укажите, верны (True) или нет (False) следующие за ним утверждения.

My perfect weekend
I am Elizabeth Haycox, a bookshop owner in Hay-on-Wye. There is also a café and a small cinema in my bookshop.
On any Friday afternoon you can find me in Richard Booth’s, the second-hand bookshop I run in Hay-on-Wye. Every Friday I frantically prepare for Saturday. I make sure the books are on the shelves, the napkins for the café are ironed, and we have enough popcorn and sweets in our 47-seat cinema. I don’t want any nasty surprises. As Hay Festival approaches (22 May - 1 June) I’m even busier. There is a lot of work to do: I paint my shop, I get in new stock, and I work out how to make the place as inspiring as possible.
I can’t say I’m the first in on Saturday but I am there for the whole day, as it’s the busiest day of the week. I am ready to do any job. I waitress in the café, I take tickets for the Saturday matinee, I change the loo rolls and I work the tills in the bookshop.
I like working on Saturdays. As a teenager I babysat, worked as a motel maid and in shops almost every Saturday. I like being independent and making my own money.
When I get home from the shop on Saturday, Paul (my husband) and I often find ourselves driving 45 minutes for dinner at someone’s house. It’s an English country tradition, isn’t it? Or we have people over to our house and Paul cooks.
I never work on Sundays; it’s a day when I relax. I lie in until about 7.30am and then take our dogs for a workout. Sunday lunch is my favourite meal; I cook a traditional roast or make a clam chowder. Then I take a nap.
After a refreshing cup of tea and a toasted cheese sandwich, I work my way through the papers for Festival inspiration and lie in bed with my ideas – not all of them good.
On Monday morning I am back in the shop. The good thing about retail is that every week starts afresh. There’ll be a new menu in the café, new films in the cinema and new books. And after working on Saturday, I’ll have a day off midweek for shopping in London.

1. Elizabeth owns a bookshop in London.
a. true b. false
2. The book shop sells new books.
a. true b. false
3. Sunday is the busiest day of the week.
a. true b. false
4. Elizabeth is married to Paul.
a. true b. false
5. Elizabeth always works on Sundays.
a. true b. false
6. Elizabeth’s husband takes the dogs for a walk.
a. true b. false
7. Elizabeth sleeps on Sunday afternoon.
a. true b. false
8. Elizabeth’s ideas are always good.
a. true b. false
9. Every week is the same for Elizabeth.
a. true b. false
10. Every Sunday Elizabeth goes shopping in London.
a. true b. false
- Предмет:
  Английский язык
- Автор:
  hopecobb
- 5 лет назад
- Ответов:
  
  1
- Смотреть
сколько будет 4b в квадрате + 4b в квадрате
- Предмет:
  Математика
- Автор:
  aussie8zdz
- 5 лет назад
- Ответов:
  
  1
- Смотреть

Среди 79 монет имеется 1 фальшивая (более легкая) монета. Как ее найти, используя не более 4 взвешиваний?

Ответы 1

Топ пользователей