Tổng 3 số là: 99x3=297

Tổng số thứ 2 và số thứ 3 là: 297-97=200

Trung bình cộng của hai số kia là: 200:2=100

1 không phải là số nguyên tố

1 không phải là số nguyên tố

Tập hợp D

12. A high percentage of the population (use/uses) mobile phones.
13. A high percentage of the people in my hometown (is/are) members of different sport clubs.
14. A car and a bike (is/are) my means of transportation.
15. Emily and Greg (come/comes) to my house every Friday for lunch.

28. That pair of trousers (look/looks) good on you.
29. Either Matilda or her brothers (use/uses) the symphony tickets each week.

36. Is it he or I who (is/am) to go?

1. Either the physicians in this hospital or the chief administrator (is/are) responsible for the failure
of the operation.
2. (Does/Do) my boss or my sisters often drop by here?
3. Some of the votes (seem/seems) to have been miscounted.
4. The tornadoes that tear through this county every spring (are/is) more than just a nuisance.
5. Everyone (have/has) to be willing to give up a lot of time to participate in charity activities.
6. Kara Wolters, together with her teammates, (present/presents) a formidable opponent on the
basketball court.
7. He seems to forget that there (is/are) things to be done before he can graduate.
8. There (have/has) to be some people left in that town after yesterday's flood.
9. Some of the grain (appear/appears) to be contaminated.
10. Three-quarters of the students (is/are) against the tuition hike.