To solve this puzzle, you can arrange the toothpicks in the shape of the number "12".
- Start with the two toothpicks laid down horizontally to create the number "1".
- Then, take the next two toothpicks to form the shape of the number "2".
This way, you can visually represent the number "12" using a total of four toothpicks. The question plays with the idea of how numbers can be represented rather than literally adding to a total of twelve toothpicks. If you meant to literally have twelve toothpicks on the table, you would simply add ten more toothpicks to the two that are already there.