2. At one primitive market, a mammoth skin was exchanged for two saber-toothed tiger skins, and a peacock feather skirt for three stone spears. At another market, which was one day's journey from the first, a mammoth skin was exchanged for three peacock feather skirts, and a tiger skin for four spears. All exchanges could be made in both directions. A hunter brought a mammoth skin to the first market and wants to exchange it for four tiger skins. Will he be able to do this within 33 days?
2. Answer: will make it.

Let $M$ be the mammoth skin, $T$ be the tiger skin, $\Pi$ be the peacock skirt, $K$ be the spear. $I$ - the first market: $M=3 \Pi, T=4 K$; $II$ - the second market: $M=2 T, \Pi=3 K$.

Day 1. Moved from $I$ to $II$ and exchanged $M$ for $3 \Pi$.

Day 2. Moved from $II$ to $I$ and exchanged $3 \Pi$ for $9 K$.

Day 3. Moved from $I$ to $II$ and exchanged $9 K$ for $2 T$ and $K$.

Day 4. Moved from $II$ to $I$ and exchanged $2 T$ and $K$ for $M$ and $K$. Thus, in 4 days, the hunter added one spear to the mammoth skin. In 32 days, he will add 8 spears to the mammoth skin, which can be exchanged for two more tiger skins. More precisely, on the 31st day, he will have 16 spears, which he can exchange for 4 tiger skins.