Из города в деревню, расстояние между которыми 50 км, одновременно выехали автомобилист и велосипедист. Известно, что за час автомобилист проезжает на 40 км больше, чем велосипедист. Определите скорость велосипедиста, если известно, что он прибыл в деревню на 4 часа позже автомобилиста. Ответ дайте в км/ч. 

У Пифагора однажды спросили, сколько у него учеников. " Половина моих учеников изучают прекрасную математику, четверть исследуют тайны природы, седьмая часть упрожняет силу духа. Добавьте к ним ещё трёх юношей, из коих Теон самый способный". Сколько было учеников у Пифагора?

1. I ____ up at six o'clock but I stayed in bed until six fifteen when my alarm clock went off.

A got B woke C opened D stayed

2. Najib's room was very messy so his mother told him to tidy it __ .

A over B out C in D up

3. I'm sorry, I can't make you a cup of tea. I used __ all the tea bags yesterday and I didn't buy any new ones. A out B in C away D up

4. I can't buy any lunch today because I ____ my money at home this morning. A forgot B took C left D put

5. When Gabriel's credit card stopped, he cut it __ into many small pieces. A out B apart C off D up

6. Rodrigo waited in his car outside the school but the other students didn't come out so he drove ___. A off B up C out D along

7. A thief took Easa's money and tried to run away. But Easa is a quick runner so he easily ______ up with the thief and took his money back. A brought B caught C took D picked

8. This Friday is International No Mobile Day. We are asking all our students to try to __ without their mobile phones for one lesson. A make B do C have D spend

9. If you spend so much money every day, you will ___ out of money before the end of the month. A pay B use C take D run

10. Sometimes Julia speaks very quickly so the other students have to ask her to slow____ . A up B out C down D off