She saw right away that the additional tiles that you had to add around the edges was always going to grow by two, so she was very confident about how she made those numbers there.
Aşa că ea imediat a observat că piesele adiţionale care trebuie adăugate în jurul laturilor au crescut de fiecare dată de două ori. Şi ea era destul de sigură cum a obţinut aceste numere.