Два маляра выполняют работу по покраске стен комнаты за 15 дней, один из них справляется с этой работой за 20 дней. Определите, за сколько дней справится второй маляр, если будет красить стены этой же комнаты в одиночку.
ответ: 60
Первый рабочий справляется с заказом на 189 деталей на 180 минут быстрее второго. Известно, что первый рабочий за час делает на 4 детали больше. Определите, сколько деталей в час делает второй рабочий.
ответ: 16
Какая из следующих прямых не пересекается и не касается параболы y=x^2 - 3?
1) y=0
2) y=8
3) y=-6
4) y=-3
ответ: 3
Вычислите: (sin(pi/2))^2 + 4cos(pi) + 11=?
ответ: 8
Вычислите: 4((cos(pi/4)) ^2 + 0,5)=?
ответ: 4
Удачи на экзамене :)
1. While I was looking for my keys, I suddenly remembered I had left them at home.
2. In those days the unions used to go on strike whenever there was a problem.
3. After they were had bought the company, they started to make a lot of people redundant.
4. Jack used to have a Mac, but then changed to a PC.
5. I asked about my package in reception, but they said that it still hadn’t arrived.
6. I was sure that I had locked the door to my office last night, but it was open this morning.
7. I’m sure that the winters used to be colder when I was a child. I remember that we were walking to school in the snow every winter.
8. I went back to the restaurant to look for my umbrella, but found that someone had taken it.
9. When George saw Diane at the seminar, he knew that he had met her somewhere before.
10. While I was having breakfast I looked at the financial pages to see the share prices. I saw that my original investment had grown by over 40%.