1) 1 + 1 = 2 → 2 + 2 = 4 → 4 + 2 = 6 → 6 + 2 = 8. Ответ: 2, 4, 6, 8.
2) 1 + 1 = 2 → 2 + 3 = 5 → 5 + 3 = 8 → 8 + 3 = 11. Ответ: 2, 5, 8, 11.
3) 9 - 1 = 8 → 8 - 1 = 7 → 7 - 1 = 6 → 6 - 1 = 5. Ответ: 8, 7, 6, 5.
4) 6 + 1 = 7 → 7 + 3 = 10 → 10 - 5 = 5 → 5 + 2 = 7 → 7 - 1 = 6. Ответ: 7, 10, 5, 7, 6.