Respuesta :

sqdancefan

9514 1404 393

Answer:

  6 pours

Step-by-step explanation:

Here are two 6-step solutions. The four digits represent the contents of the 9,5,4,2 containers (in that order) after a single pour. The starting condition is 9000.

Solution 1:

  1. 7002 — 9 > 2
  2. 7200 — 2 > 5
  3. 3240 — 9 > 4
  4. 3510 — 4 > 5
  5. 3312 — 5 > 2
  6. 3330 — 2 > 4

Solution 2:

  1. 5040 — 9 > 4
  2. 5400 — 4 > 5
  3. 1440 — 9 > 4
  4. 1530 — 4 > 5
  5. 1332 — 5 > 2
  6. 3330 — 2 > 9