Task 2. A poultry farm delivered 720 eggs, which were packed in boxes of 6 eggs each. During transportation, 140 eggs were broken. The remaining eggs were packed in boxes of 12 eggs each. How many boxes of eggs were packed. Were there any unbroken eggs left that could not be packed?
Solution. From 720 eggs, after transportation, $720-140=580$ eggs remained. These need to be packed into boxes of 12, meaning there would be $580: 12=48$ boxes and 4 eggs would remain which cannot be packed this way.