Problem 3. During the first week, a squirrel collected 84 nuts, during the second week 96 nuts, and during the third week 65 nuts. Another squirrel in the fourth week collected three times more nuts than the first squirrel collected in the second and third weeks combined. How many nuts in total did the two squirrels collect over the four weeks?
Solution. The first squirrel collected $84+96+65=245$ hazelnuts over the three weeks. The second squirrel in the fourth week collected a total of 3$\cdot$(96+65) $=3 \cdot 161=483$ hazelnuts. The two squirrels together collected $245+483=728$ hazelnuts.