Помогите пожалуйста.
3)Test 1. What is the next number? Write it out in words.
5. 3, 6, 9, ______. 15. 100, 200, 300, ______.
6. 4, 8, 12, ______. 16. 90, 80, 70, ______. 53, 54, 55, ______.
7. 5, 10, 15, ______. 17. 3, 2, 1, ______.
. 16, 15, 14, ______. 18. 0, 1, 2, ______. 25. 64, 63, 62, ______.
Заранее спасибо.