16 Isolation Rooms

A hospital has 16 isolation rooms. Each room has a patient with a different illness.

16 isolation rooms puzzle

Patient in room 13 recovers and wants to say goodbye to each patient. The problem is that if he visits a patient twice, he becomes ill again.

How does he visit each patient only once and exit from room 4?

Answer

There are 3 possible solutions.

13 > 9 > 13 > 14 > 10 > 6 > 5 > 1 > 2 > 3 > 7 > 11 > 15 > 16 > 12 > 8 > 4

16 isolation rooms solution 1

13 > 9 > 13 > 14 > 10 > 11 > 15 > 16 > 12 > 8 > 7 > 6 > 5 > 1 > 2 > 3 > 4

16 isolation rooms solution 2

13 > 14 > 13 > 9 > 10 > 11 > 15 > 16 > 12 > 8 > 7 > 6 > 5 > 1 > 2 > 3 > 4

16 isolation rooms solution 3

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