Ответ:

  1. \(15:5=3\); \(3\cdot6=18\); \(18+22=40\); \(40-13=27\); \(27:3=9\). Цепочка: 15 → 3 → 18 → 40 → 27 → 9.
  2. \(2\cdot6=12\); \(12+12=24\); \(24:6=4\); \(4\cdot5=20\); \(20-15=5\). Цепочка: 2 → 12 → 24 → 4 → 20 → 5.

Ответ: 1) 3, 18, 40, 27, 9; 2) 12, 24, 4, 20, 5.