Problem 2. A family of four octopuses came to a shoe store (each octopus has 8 legs). The father octopus already had half of his legs booted, the mother octopus had only 3 legs booted, and their two sons had 6 legs booted each. How many boots did they buy if they left the store fully booted?
Answer: 13.

Solution. The daddy octopus had half of his legs booted, that is, 4 legs. Thus, 4 legs were not booted.

The mommy octopus had 3 legs booted, meaning 5 legs were not booted.

Each of the two sons had 6 legs booted, meaning 2 legs were not booted.

Thus, a total of $4+5+2+2=13$ boots were bought.

## Criteria

## 3 p. Only the correct answer is provided.

4 6. The correct answer is provided, along with the calculations used to obtain it.