Какое число делиться одновременно на:2,6,8,20,30, и 42. Помогите оч.нужно.

нужно правильно по смыслу расставить предложения чтобы получился складный текст!

A) He often told his friends that he could tell anyones character exactly by his handwriting. So one lady friend decided to give it test.

B) The lady was surprised. She smiled and explained that this was Balzacs own exercise book which he used when he was a little boy.

C) She brought him a young boys exercise book. She said she wanted to know what Balzac thought of the boys character.

D) Balzac, the famous French writer, was a man of great talent. He was very proud of his ability to tell a persons character by his or her handwriting.

E) He decided to tell the truth. The boys exercise book showed that it was written by a bad , lazy fellow with no respect to other people.

F)She told him that the boy wasnt her son and asked him to tell her the truth. Balzac studied the boys handwriting very carefully.

ПОСТАВИТЬ ГЛАГОЛЫ В СКОБКАХ В НУЖНОМ ВРЕМЕНИ. (ОБРАЩАЙ ВНИМАНЕ НА ПОКАЗАТЕЛИ ВРЕМЕНИ)

1 He(not like) ham sandwiches.

2 He (come) from school at two o'clock

3This book (cost) three dollars

4.Bill(not be) here since yesterday morning

5.I(do) my lessons yet

6.What (you eat) fot breakfast?

Решите пожалуйста способом группировки пример.   21y^3+7y^2-45y-15. 

в трапеции ABCD с основаниями AD и BC диагонали пересекаются в точке O, BD:OD=2:3 AC=25 см найти: AO, OC