(a) Imagine eight caves in a circle and two hunters. Prove the wabbit can be caught.
(b) Imagine nine caves in a grid (as shown below). The wabbit can move vertically or horizontally. For instance, if the wabbit is in cave 2 today, then tomorrow, the wabbit must be in one of caves 1, 3, or 5. Remember that the wabbit cannot stay in the same cave on consecutive days.
1 | 2 | 3 |
4 | 5 | 6 |
7 | 8 | 9 |
Table 1: Kill the Wabbit with 9 caves. Prove that the wabbit can be caught with three hunters.
(c) Using the same setup as part (b) but only two hunters, can the wabbit be caught? If so, give a proof. If not, explain why not.
Solution:
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