2. A father has five sons, all of different ages. The father has a certain amount of money that he wants to divide among his five sons. The youngest will receive the least amount of money, and each subsequent older son will receive 45 kuna more. The oldest son will receive 13 times more kuna than the youngest. How much money will the son who is third in age receive?
2. Let the youngest son receive $x$ kuna. Then the other sons received

A TOTAL OF 10 POINTS

$x+45, x+90, x+135, x+180$ kuna, respectively, in increasing order of age.

According to the condition of the problem, the oldest son will receive 13 times more kuna than the youngest,

4 POINTS so the equation $13 x=x+180$ holds, i.e., $12 x=180$, from which $x=15$.

Therefore, the son who is third in age received $x+90=15+90=105$ kuna.