Умоляю!!! Помогите придумать прикольную задачку для 7-8 класса по алгебре с решением. Очень нужно! Оригинальность приветствуется! Даю вам 78 пкт и +38 за лучшее решение!

Автобус проезжает расстояние между двумя городами за 30 часов. Если автобус и легковая машина одновременно выедут из этих городов навстречу друг другу то они встретятся через 12 часов. за Сколько часов расстояние между городами проезжает легковая машина.

каково значение северного морского пути

помогите пожалуйста поставить глаголы в скобочках в нужное настоящее время

41.  Katia says she (be) very tired recently. She (work) almost sixty hours a week for the past month.

42.  My daughter-in-law (try) to find a job since she graduated from university.

43.  How long you (be) a hairdresser?

44.  The police (investigate) the break-in at the college since last September.

45.  She always (be) obsessed by her appearance.

46.  They are so scruffy because they (camp) all week.

47.  I'm fed up. I (wait) for the bus sincethree o'clock.

48.  Carol already (make) ten phone calls and it's onlynine o'clock.

49.  She's obviously very unhappy. She (sit) alone in her bedroom for most of the day.

50.  Paul and Jean (go out) together for about a year now. 51.1 can smell something nice. What you (cook)!

52.  He always (argue) or (fight).

53.  I'm afraid my nails are a bit dirty. I (work) in the garden.

54.  I'm afraid I (break) one of your glasses.

55.  You look exhausted. What you (do)!

56.  Since I last stayed at this hotel, they (put) their prices up.

57.  The police (arrest) the man who is suspected of com­mitting the murder.

58.  Since I (broke) my leg I (depend) on my daughter to see to the shopping and housework.

59.  He (apply) for jobs without success for months now.

60.  The hall (hold) 300 people on some occasions, though you'd hardly believe it.

61.  Sorry about the mess! The workmen (install) a new boiler in the bathroom all morning.

62.  The success of the agricultural show (depend) very much on the weather in recent years.

63.  Up to now the discount (apply) only to children under 10. From next month we (plan) to extend it to children under 16.

64.  Food prices (rise) so rapidly in the past few months that some families have been forced to alter their eating

habits.

65.  Although Max (cook) for many years, he still doesn't know how to prepare French foods in the traditional marfner.